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GB 14102-2005 PDF in English


GB 14102-2005 (GB14102-2005) PDF English
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GB 14102-2005: PDF in English

GB 14102-2005
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.220.20
C 82
Replacing GB 14102-1993
Fire Resistant Shutter
防火卷帘
ISSUED ON: APRIL 22, 2005
IMPLEMENTED ON: DECEMBER 1, 2005
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 Structural Diagram, Name Symbols and Codes ... 8
5 Classification ... 9
6 Requirements ... 11
7 Test Methods ... 18
8 Inspection Rules ... 26
9 Marking, Packing, Transportation and Storage ... 28
Appendix A (Normative) Requirements and Test Methods for Door Roller of
Fire Resistant Shutter ... 30
Appendix B (Normative) Requirements and Test Methods for Control Box of
Fire Resistant Shutter ... 36
Fire Resistant Shutter
1 Scope
This standard specifies definitions, classifications, requirements, test methods and
inspection rules as well as marking, packing, transportation and storage of fire
resistant shutter.
This standard is applicable to smoke-proof fire resistant shutters in industrial and civil
buildings.
Inorganic fiber composite fire resistant shutter specified in this standard is only
applicable to indoor well-ventilated dry place.
2 Normative References
The following standards contain provisions which, by reference in this text, constitute
provisions of this national standard. For dated reference, subsequent amendments
(excluding amending errors) to, or revisions of, any of these publications do not apply.
However, all parties coming to an agreement according to this standard are
encouraged to study whether the latest editions of these documents are applicable.
For any undated references, the latest editions of the documents referred to apply.
GB/T 1243 Short Pitch Transmission Precision Roller Chains and Chain Wheels
(GB/T 1243-1997, eqv ISO 606: 1994)
GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1: Sampling
Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection (GB/T
2828.1-2003, ISO 2859-1:1999, IDT)
GB/T 3923.1 Textiles - Tensile Properties of Fabrics - Part 1: Determination of
Breaking Force and Elongation at Breaking Force - Strip Method (GB/T 3923.1-1997,
neq ISO/DIS 13934-1:1994)
GB 4717-1993 General Technical Conditions for Fire Alarm Control Units
GB/T 5454 Textiles - Burning behavior - Oxygen Index Method (GB/T 5454-1997,
neq ISO 4589:1984)
GB/T 5455 Textiles - Burning Behavior - Vertical Method
GB/T 5464 Non-combustibility Test Method of Building Materials (GB/T 5464-1999,
idt ISO 1182:1990)
GB/T 7633 Fire Resistance Tests - Door and Shutter Assemblies (GB/T 7633-1987,
eqv ISO 3008:1976)
GB 8624-1997 Classification for Burning Behavior of Building Materials and
Products
GB 9969.1 General Principles for Preparation of Instructions for Use of Industrial
Products
GB/T 14436 General Principles of Industrial Product Guarantee Documents
GB 15930-1995 Fire Dampers - Tests
3 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
Steel fire resistant shutter
A kind of shutter, consisted of curtain plate, guide rail, riser plate, lintel, box that are all
made of steel materials as well as matched door roller and control box, which meets
requirements on fire integrity
3.2
Inorganic fiber composite fire resistant shutter
A kind of shutter, consisted of curtain surface (with stainless steel wire or stainless
wire rope matched inside) made of inorganic fiber materials and clamp plate, guide
rail, riser plate, lintel and box that are all made of steel materials as well as matched
door roller and control box, which meets requirements on fire integrity
3.3
Special type fire resistant shutter
A kind of shutter, consisted of curtain surface made of inorganic fiber materials or
steel materials and guide rail, riser plate, clamp plate, lintel and box that are all made
6 Requirements
6.1 Appearance quality
6.1.1 Surface of metal parts of fire resistant shutter shall be free from crack,
indentation and obvious concave-convex, hammered mark, bur, missing hole and
other defects, and shall be evenly coated and plated for rust prevention; and shall be
free from peeling and flowing.
6.1.2 Inorganic fiber composite curtain surface of fire resistant shutter shall be free
from crack, broken corner, remedy, hole, inclination, jumper, breakage, visible
unevenness in density of wrap and weft, color difference and other defects; the clamp
plate shall be straight and fastened; warp direction of base cloth shall be the forced
direction of curtain surface that shall be beautiful, straight and tidy.
6.1.3 Relative moving parts in the process of cutting, bending and sinker drilling
shall be free from burrs.
6.1.4 Assembling and splicing points of all parts shall be free from misalignment;
welding point shall be fastened; and the appearance shall be flat and smooth, free
from slag inclusion, solder skips and loosening.
6.1.5 All fasteners shall be tightened and free from loosening.
6.2 Materials
6.2.1 Raw materials for inorganic fiber composite fire resistant shutter shall meet
requirements on health and environmental protection, and materials explicitly
prohibited by the State shall not be put into use.
6.2.2 Raw materials for main parts of fire resistant shutter shall meet the
requirements of corresponding national standards or professional standards.
6.2.3 Thickness of raw materials for main parts of fire resistant shutter should be
adopted in accordance with Table 5.
Table 5 -- Thickness of Raw Materials (Unit: mm)
Parts Thickness of raw materials
Curtain plate Thickness (ordinary type): ≥1.0; thickness of any curtain sheet
Clamp plate ≥3.0
Riser plate ≥3.0
Guide rail Buried type: ≥1.5; exposed type: ≥3.0
6.3.7.2 Surfaces of driving mechanism, bearing and chain shall be free from rust
and shall be added with proper amount of lubricant as required.
6.3.7.3 Deflection of shaft of vertical shutter under normal operation shall be less
than 1/400 of shaft length.
6.3.7.4 Shaft of side shutter shall be installed and vertical to foundation surface.
Error of verticality shall be less than 1.5 mm/m. The total length shall be less than
5mm.
6.3.8 Door roller
Door roller for fire resistant shutter shall be approved product qualified in the test
conducted by national fire detection organization and its performance shall be in
accordance with Appendix A.
6.3.9 Control box
Control box for fire resistant shutter shall be approved product qualified in the test
conducted by national fire detection organization and its performance shall be in
accordance with Appendix B.
6.4 Performance requirements
6.4.1 Air pressure resistance
6.4.1.1 Curtain plate of steel fire resistant shutter shall be of certain air pressure
resistant strength. At specified load, the curtain plate shall not fall off from the guide
rail and its deflection shall be in accordance with Table 8.
6.4.1.2 Anti-derail device may be arranged between the curtain surface and the
guide rail to prevent the plate from derailing.
6.4.2 Smoke-proof performance
6.4.2.1 Smoke control device for guide rail and lintel of fire resistant and smoke
control shutter shall be in accordance with 6.3.4.5 and 6.3.5.1.
6.4.2.2 If differential pressure on both sides of curtain surface of fire resistant and
smoke control shutter is 20 Pa, smoke leakage amount of the surface shall not be
greater than 0.2m3/(m2ꞏmin) under standard condition (20 , 101325Pa).
6.4.3 Operation stability
After the assembling of fire resistant shutter, the curtain surface shall operate stably in
the guide rail without being derailed and obviously inclined; two curtain surfaces of
double-curtain surface shutter shall be lifted simultaneously, and their height
difference shall not be greater than 50mm.
Table 8 -- Deflection of Curtain Plate
Code
Air pressure Deflection/mm
B≤2.5 m B=3 m B=4 m B=5 m B=6 m B>6 m
50 490 25 30 40 50 60 90
80 784 37.5 45 60 75 90 135
120 1177 50 60 80 100 120 180
Note: air pressure resistance test may not be conducted for indoor steel fire resistant shutter and inorganic fiber
6.4.4 Noise
Average noise caused by the startup/shutdown of fire resistant shutter shall not be
greater than 85dB.
6.4.5 Electric startup/shutdown speed and deadweight descending speed
The speed during electric startup/shutdown of vertical shutter shall be
2m/min~7.5m/min. And its deadweight descending speed shall not be greater than
9.5m/min, while the speed during electric startup/shutdown of side shutter shall not be
less than 7.5m/min. And that during electric startup/shutdown of horizontal shutter
shall be 2m/min~7.5m/min.
6.4.6 Two-step shutdown performance
Fire resistant shutter installed at evacuation exit shall be provided with two-step
closing performance which means that the control box automatically shuts down to
the mid-position of fire resistant shutter and stops after receiving the alarm signal,
then continues to shut down to a complete close after a 5s~60s delay; or after
receiving the alarm signal for the first time, the control box shuts down to the
mid-position of fire resistant shutter and stops, and continues to shuts down to a
complete close after receiving the alarm signal for the second time.
6.4.7 Temperature-control release performance
Temperature control release device shall be arranged for fire resistant shutter; if the
ambient temperature of temperature-sensing elements of the release device reaches
73 ±0.5 , then the shutter shall fall off and shut down according to its deadweight.
6.4.8 Fire resistance
The fire resistant rating of fire resistant shutter shall be in accordance with Table 4.
7 Test Methods
7.1 Appearance quality
Appearance quality of fire resistant shutter shall be visually inspected combined with
hand touching.
7.2 Materials
7.2.1 Inspection sheet and quality guarantee list on main materials of fire resistant
shutter shall be provided by the manufacturer. Thickness of the materials is measured
by caliper.
7.2.2 Fold decorative cloth or base cloth of inorganic fiber composite fire resistant
curtain surface in forward and reverse direction 4 times and put it in low temperature
test chamber. Adjust the temperature of the test chamber to 20 ±2 and maintain it
for 30 min± 5 min, then reduce the temperature to -20 ±2 at the rate not greater
than 5 /min (not greater than the average in 5 min) and maintain it for 48h, then take
out the decorative cloth or base cloth from the low-temperature chamber, observe
whether it's brittle crack and still elastic. Fold decorative cloth or base cloth of
inorganic fiber composite fire resistant curtain surface in forward and reverse direction
4 times and put it in high temperature test chamber. Adjust the temperature of the test
chamber to 20 ±2 and maintain it for 30 min± 5 min, then increase the temperature
to +50 ±2 at the rate not greater than 5 /min (not greater than the average in 5
min) and maintain it for 48h, then take out the decorative cloth or base cloth from the
low-temperature chamber, observe whether it's adhered.
7.2.3 Combustion performance for decorative cloth of inorganic fiber composite fire
resistant curtain surface shall be inspected according to GB/T 5454 and GB/T 5455,
and that of base cloth shall be inspected according to GB/T 5464.
7.2.4 Breaking strength for various textiles of inorganic fiber composite fire resistant
curtain surface shall be inspected according to GB/T 3923.1.
7.3 Parts
7.3.1 Dimension tolerance
7.3.1.1 Length (L) of steel fire resistant shutter plate is measured with steel tape at
h/2. Width (h) and thickness (s) is measured with a caliper at 50 mm from both ends of
the curtain surface and L/2, from which the average is taken, see Figure 5.
7.3.7.3 Error of perpendicularity of side shaft is measured according to the
requirements of 7.3.4.4.
7.3.8 Door roller
Performances for door roller of fire resistant shutter are measured in accordance with
Appendix A.
7.3.9 Control box
Performances for control box of fire resistant shutter are measured in accordance with
Appendix B.
7.4 Performance requirements
7.4.1 Air pressure resistance
7.4.1.1 Test equipment
Air pressure resistance test equipment of the plate is shown in Figure 7. Test
equipment includes the following parts:
a) Adjustable support: with locking device, air pressure resistance test for
curtain plates with different lengths may be carried out by adjusting support.
b) Sandbag: the mass of each sandbag is 3.0 kg, the sand with loose thickness
of 1500 kg/m3 is filled in for loading of the test piece.
c) Deflectometer: measure and display deflection of the test piece, precision: ±
1.0 mm.
d) Others: ruler, steel tape, caliper and platform scale.
7.4.1.2 Test piece
Randomly take three of the curtain sheets with identical production condition, and
mesh them horizontally into shutter as test piece.
7.4.1.3 Test procedure
a) Measure the mass and dimension of the test piece and calculate the area.
b) Install the test piece in the guide rail groove of the adjustable support with its
windward side upward.
Q0 - the measured smoke leakage of the equipment, [m3/(m2ꞏmin)];
T0 - the gas temperature in the measuring pipeline when measuring the smoke
leakage of the equipment, ( );
B0 - the atmospheric pressure when measuring the smoke leakage of the equipment,
(Pa);
P0 - the gas pressure at the flowmeter when measuring the smoke leakage of the
equipment, (Pa).
7.4.3 Operation stability
Visual inspection is carried out for operation stability of fire resistant shutter. Height
difference between two curtain surfaces of the double-curtain surface shutter is
measured with steel tape.
7.4.4 Noise
Noise of the fire resistant shutter in operation is measured with sound level meter from
which the vertical distance to the surface of the shutter is 1 m, and to the ground is 1.5
m. Three points in horizontal direction shall be measured, from which the average is
taken.
7.4.5 Electric startup/shutdown speed and deadweight descending speed
Electric startup/shutdown speed and deadweight descending speed of the fire
resistant shutter is measured with steel tape and stopwatch.
7.4.6 Two-step shutdown performance
Visual inspection is carried out for two-step shutdown performance of the fire resistant
shutter. Time delay interval is measured with stopwatch.
7.4.7 Temperature-control release performance
7.4.7.1 Operating temperature of temperature-control release device
Three sets of temperature-control release device are selected to conduct test
according to 5.1 in GB 15930-1995. If the operating temperatures of the
temperature-control release devices are all qualified, then the operating temperature
will be judged qualified, or else, it will be judged unqualified.
Note: if effective inspection report is provided, the test may not be carried out.
7.4.7.2 Linked performance of temperature-control release device
After installation and commissioning, open the fire resistant shutter to upper limit, cut
off the power, and heat the temperature-control release device so that its heat
element moves, then observe the descending and shutdown of the shutter.
7.4.8 Fire resistance
The fire resistance rating of fire resistant shutter shall be tested according to GB/T
7633. For fire resistance rating of steel fire resistant shutter and inorganic fiber
composite fire resistant shutter, their fire integrity shall be measured according to
GB/T 7633; for fire resistance rating of special type fire resistant shutter, its fire
integrity and insulation shall be measured according to GB/T 7633.
Note: if the tested party or client requires to measure the heat radiation intensity on the unexposed surface of the
shutter, the inspection may be carried out in accordance with GB/T 7633 or the method provided by the tested party or
client, but the result is not the judgment basis for fireproof performance of the shutter.
8 Inspection Rules
8.1 End-of-manufacturing inspection
8.1.1 Inspection items are 6.1, 6.2.1, 6.2.2, 6.2.3, 6.3.1, 6.3.3, 6.3.4.2 and 6.3.7.3.
8.1.2 End-of-manufacturing inspection is in accordance with GB/T 2828.1, general
inspection level II is adopted, and acceptance quality limit is 6.5 with sampling plan of
one normal inspection.
8.1.3 Fire resistant shutter shall be inspected by quality inspection department of the
manufacturer according to end-of-manufacturing inspection item, and each item shall
be qualified, and they shall not be delivered until the certificate is signed and issued.
8.2 Type inspection
8.2.1 Inspection items are all the contents required by the standard.
8.2.2 Type inspection shall be carried out under any of the following circumstances:
a) Trial production and design appraisement of new products or existing
products during transfer-plant production;
b) There is major change in the structure, material, process and critical
procedure of the product which may influence the product performance.
c) Restoration of production after shutdown for over 1 year.
d) The result of delivery inspection differs greatly from that of the last type
inspection.
e) Significant quality accident occurs.
f) Requested by quality supervision institutions.
8.3 Inspection quantity and judgment rules
Randomly take a set of fire resistant shutter from the same batch of products qualified
in end-of-manufacturing inspection. If inspection items are all qualified, the batch of
products will be judged qualified for type inspection; if the inspection items listed in
Table 9 are all qualified, at most 4 items (including 4 Items) in other inspection items
are unqualified, but qualified after repair, the batch of products will be judged qualified
for type inspection; if the inspection items listed in Table 9 are all qualified, more than
4 items in other inspection items are unqualified, or any one of the inspection items in
Table 9 is unqualified, the batch of products will be judged unqualified for type
inspection; on this occasion, double sampling is needed for the batch of products for
re-inspection for the unqualified items. If all items of the re-inspection are all qualified,
the batch of products, except those unqualified in the first inspection, will be judged
qualified for type inspection; if one item of the re-inspection is still unqualified, the
batch of products will be judged unqualified for type inspection.
Table 9 -- Inspection Items
Item Fire resistance Air pressure resistance
Two-step
shutdown
performance
Operation
stability
Smoke leakage
of curtain surface
Temperature-control
release performance
Steel fire
resistant shutter √ √ √ √ √
Steel fire
resistant
smoke-proof
√ √ √ √ √ √
Inorganic fiber
composite fire
resistant shutter
√ √ √ √
Inorganic fiber
composite fire
resistant
smoke-proof
shutter
√ √ √ √ √
Appendix A
(Normative)
Requirements and Test Methods for Door Roller of Fire Resistant Shutter
A.1 Requirements
A.1.1 Appearance and parts
A.1.1.1 The enclosure of door roller shall be complete, free from unfilled corner,
obvious cracks and deformation.
A.1.1.2 The surface of coating part shall be smooth, and free from such defects as
obvious bubble, wrinkle, spot, sagging, etc.
A.1.1.3 The part of door roller shall not be made of flammable and combustible
material.
A.1.1.4 The operating device of door roller shall be for the convenience of users.
A.1.2 Basic performance
A.1.2.1 The rated output torque of door roller shall meet the design requirements.
The manufacturer shall provide inspection certificate.
A.1.2.2 The internal contracting brake shall be reliable with the brake force not less
than 1.5 times of the balance weight in rated output torque; the sliding displacement
shall not be greater than 20mm.
A.1.2.3 The door roller shall be provided with flexible and reliable manual operating
device whose installation position shall be convenient for operation. There shall be
free from slide and impact during operating fire resistant shutter to start up and shut
down with manual operating device.
A.1.2.4 The door roller shall be provided with such functions as electric
startup/shutdown and constant-speed descending by the deadweight of fire resistant
shutter. The electric startup/shutdown and the descending speed of deadweight shall
meet the requirements of 6.4.5, and the arm strength to start deadweight-descending
of fire shutter shall not be greater than 70N.
A.1.2.5 The door roller shall be equipped with automatic limit device which is able to
stop automatically when the fire resistant shutter startup/shutdown to upper/lower limit
with the resetting error less than 20mm.
A.1.3 Mechanical life
After balance weight in rated output torque, the cycle times of startup/shutdown
operation of door roller shall not be less than 2000.
Note: a cycle of roller shutter means the duration from shutdown to complete opening state then to
complete shutdown.
A.1.4 Noise
The noise of door roller shall not be greater than 65dB during no-load operation.
A.1.5 Power supply performance
When the fluctuation range of the AC network supply voltage is less than or equal to
+10% of the rated voltage and no less than -15% of that, the door roller shall be
capable of normal operation.
A.1.6 Safety performance
A.1.6.1 Insulation resistance
Under normal atmospheric condition, the electrical insulation resistance of door roller
shall be greater than 20MΩ.
A.1.6.2 Voltage resistance
The test voltage (1760V, 50 Hz) shall be able to be applied between live parts and
enclosure of the door roller for 1 min without punctuation, surface flashover or
scanning. After the test, its performance shall meet the requirements of A.1.2.
A.1.7 Stability in climatic environment
The door roller shall be able to withstand each test under specified climatic
environment of Table A.1. After the test, its performance shall be in accordance with
those specified in Table A.1.2.
A.2 Test methods
A.2.1 Appearance and parts
Figure A.1 -- Equipment for Basic Performance Test
A.2.2.3 Test items
A.2.2.3.1 Output torque
Start up and shut down the door roller after connecting the weight and shaft; measure
and calculate the output torque of door roller.
A.2.2.3.2 Brake force
The weight is added to 1.5 times of the balance weight under rated output torque of
door roller, then start the door roller to observe its operating condition; shut down the
door roller and visually inspect its brake condition, then measure the sliding
displacement with straight ruler.
A.2.2.3.3 Manual operation performance
The manual operation performance of door roller shall be visually inspected.
A.2.2.3.4 Electric startup/shutdown speed, deadweight descending speed and
arm strength
The electric startup/shutdown speed and deadweight descending speed shall be
measured with tape and stopwatch. The deadweight descending arm strength is
measured with spring-loaded thrust meter (the precision: ±2 N) or weight.
A.2.2.3.5 Resetting error
After the door roller is fitted into the shutter (or by the virtue of the test equipment in
Figure A.1) under normal operation condition, start the door roller and make it operate
for a while, then shut down the door roller to measure the resetting error with straight
ruler.
A.2.3 Mechanical life
After balancing weight under rated output torque with the test device shown in Figure
A.1, start/shut down the door roller so as to be complete open, then make it descend
to complete shutdown to finish a cycle. The door roller stops for 25 min after each
continuous operation for 5min; repeat the above-mentioned action and inspect the
mechanical life of door roller. The test may be conducted continuously by manual or
mechanical method to lower the operating temperature of door roller.
A.2.4 Noise
Appendix B
(Normative)
Requirements and Test Methods for Control Box of Fire Resistant
Shutter
B.1 Requirements
B.1.1 Appearance
B.1.1.1 All components and parts of control box shall be installed firmly; the control
organ shall be flexible and reliable.
B.1.1.2 Inside the control box shall be clean and free from impurities. The routing
inside the box shall be even and errorless.
B.1.2 Main parts
B.1.2.1 Indicator light
a) The indicator lights of control box shall differ in their colors: the red one refers
to the fire alarm signal, the yellow or light yellow one refers to fault signal and
the green one refers to normal operation of power supply. And the colors
beyond the above-mentioned may serve the purpose of other functions.
b) All the indicator lights shall be clearly marked with their functions.
c) Under the operating condition of general environment, the indicator light shall
be clearly visible from 3m away.
B.1.2.2 Wiring terminals
All the wiring terminals shall be clearly ad firmly marked with serial number and
symbol whose meaning shall be provided in the product instructions.
B.1.2.3 Switches and keys
The switches and keys of control box shall be firm and durable, and they shall be
marked with their functions at the position thereupon or nearby. The switches and
buttons (boxes) of control box shall be installed for the convenience of operator.
B.1.3 Basic performance
B.1.3.1 General requirements
The control box shall be equipped with operating buttons or boxes; under normal
operation, the electric startup/shutdown of fire resistant shutter is controlled by
operating buttons.
B.1.3.2 Fire alarm performance
The control box is able to directly or indirectly receive the fire alarm signal from fire
detector or fire control center. And it shall complete the following actions automatically
once receiving the fire alarm signal:
a) Send out audible and visual alarm signals.
b) Control the fire resistant shutter to complete two-step shutdown. It means
that the control box automatically shuts down to the mid-position of fire
resistant shutter and stops after receiving the alarm signal, then continues to
complete shutdown after a 5s~60s-delay; or after receiving the alarm signal
for the first time, the control box shuts down to the mid-position of fire
resistant shutter and stops, and continues to complete shutdown after
receiving the alarm signal for the second time.
c) Send out the feedback signal, feed the positional status signal of fire resistant
shutter back to fire control center so as to realize the online control of fire
center.
B.1.3.3 Escape performance
When fire hazard happens, if fire resistant shutter lies below the mid-position, and
manually operate any one of the buttons of the control box, the fire resistant shutter
shall be able to open automatically to the mid-position, then it shall continue shutting
down to complete close after a 5s~60s delay.
B.1.3.4 Fault alarm performance
B.1.3.4.1 The control box shall be arranged with a protective device for the phase
sequence of power supply which prevents the roller shutter from reversion when the
power supply is in open phase or the phase sequence is in fault.
B.1.3.4.2 When the fire detector is disconnected or in fault, the control box is able to
send out audible and visual alerting signals.
B.2.3.3 Escape performance
The fire resistant shutter is at the state of shutdown, and make the control box to be in
the state of fire alarm. Manually operate any one of the buttons, and visually inspect
the startup, time delay and shutdown condition of fire resistant shutter. Measure the
time delay of fire resistant shutter with stopwatch.
B.2.3.4 Fault alarm performance
B.2.3.4.1 Randomly power off any one phase or swop any two phases of the power
supply; manually operate the buttons of control box; visually inspect the action
condition of fire resistant shutter and the alarm condition of control box.
B.2.3.4.2 Disconnect the fire detector and visually inspect the alarm condition of
control box.
B.2.4 Power supply performance
Connect the control box with the fire resistant shutter, then with the power grid via
pressure regulating equipment. Regulate the pressure regulating equipment. The
input voltage of control box is made to be 110% and 85% of rated o......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.