MT/T 122.1-2019 English PDF

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MT/T 122.1-2019: (Shearer disconnector for rated voltage 1.14kV and below)
Status: Valid

MT/T 122.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
MT/T 122.1-2019	279	Add to Cart	3 days	(Shearer disconnector for rated voltage 1.14kV and below)	Valid
MT/T 122-1985	199	Add to Cart	2 days	Isolating Switch of Gm Series Coal Cutter	Obsolete

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GB/T 11022   GB/T 3906   GB/T 25307   

Basic data

Standard ID: MT/T 122.1-2019 (MT/T122.1-2019)
Description (Translated English): (Shearer disconnector for rated voltage 1.14kV and below)
Sector / Industry: Coal Industry Standard (Recommended)
Classification of Chinese Standard: K43
Classification of International Standard: 29.130.10
Word Count Estimation: 12,144
Date of Issue: 2019
Date of Implementation: 2020-06-01
Issuing agency(ies): State Coal Mine Safety Supervision Administration

MT/T 1:

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Isolating Switch of Gm Series Coal Cutter Ministry of Coal Industry Standards MT 122-85 GM Series Shearer Isolator Published 1985-11-09 1986-01-01 implementation Published by the Ministry of Coal Industry

Contents

1 Type, basic parameters and dimensions 1 2 Technical requirements 1 3 Test methods and inspection rules 2 4 Marking, packaging, transportation, storage 3 MT 122-85 GM Series Shearer Isolator This standard is applicable to the GM series shearer disconnect switch. This series of switches is used for closing the load of the shearer and cutting off the power of the motor. And can cut off the motor meter with load in emergency situations. 1 Type, basic parameters and dimensions 1.1 Type This series of switches are manual switches, which are divided into three-pole single-breakpoint and three-pole double-breakpoint. 1.2 The basic parameters and dimensions shall comply with the requirements in Table 1.

2 Technical requirements

2.1 The switch shall comply with the requirements of this standard and shall be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 2.2 Normal working conditions of the switch. a. Altitude does not exceed 1000 meters; b. The temperature of the surrounding medium is not higher than 40 ° C and not lower than -20 ° C; c. The relative humidity of the air is not greater than 95% (25 ° C); d. Medium without explosion danger; e. no corrosive gas environment; f. No rain or snow or places prone to water splashing; g. closing and opening without load; h. If the user has special requirements, the user and the manufacturer should negotiate together. 2.3 Switch performance indicators 2.3.1 The insulation of the switch shall be able to withstand the withstand voltage test for 1 minute at 50 Hz AC and the positions listed in Table 2 and the test voltage value (effective value). No breakdown or flashover. 2.3.2 The moisture resistance test of the switch is in accordance with GB 2424.4-81 `` Basic Environmental Test Procedures for Electrical and Electronic Products, Test Db. Alternating Humidity Test Method The provisions of the Act. After the test, the insulation resistance of each part listed in Table 2 should not be less than 2.5 megohms. 2.3.3 When the temperature of the surrounding medium is 35 ° C, the current-carrying parts of the switch are measured at various parts of the switch using the thermocouple method under the long-term rated current. The temperature rise shall not exceed the requirements in Table 3. 2.3.4 Under the condition of 1.05Un rated voltage cosϕ = 0.35, the limit breaking capacity of the switch shall meet the requirements of Table 1. The interval is 3 minutes. 2.3.5 When the switch is in the closed position, it should be able to withstand the thermal stability current value specified in Table 1, a thermal stability test lasting 10 seconds, without Contact welding and permanent deformation. The temperature rise value after the test shall meet the requirements in Table 3. 2.3.6 The switch should be able to withstand the peak value of the dynamic and stable current specified in Table 1 at the closing position. Three dynamic stability tests in 0.5 seconds without contact Welding, automatic pop-up, and permanent deformation prevent the switch from working. 2.3.7 The mechanical life of the switch should not be less than.2000 times. After the test, it should be able to continue working after adjusting or replacing some parts. 2.4 The electrical clearance and creepage distance of the switch shall comply with the requirements of Tables 1 and 3 of GB 3836.3-83 "Explosion-proof electrical equipment for explosive environments," e ", increased safety electrical equipment. 2.5 Any loosely threaded connections on the switch shall be taken to prevent loosening. 2.6 Switch appearance quality 2.6.1 The surface should be flat and free from defects such as flash and cracks. 2.7 Under the condition that the user complies with the rules of use, transportation and storage, within three months from the date of shipment from the manufacturer, the product due to poor manufacturing quality In the event of damage or malfunction, the manufacturer shall be responsible for repairing or replacing products or parts for users free of charge.

3 Test methods and inspection rules

3.1 Each switch needs to pass the inspection before leaving the factory, and is accompanied by a product certificate. 3.2 The switch test is divided into factory test and type test. 3.3 Each switch needs to be factory tested when it leaves the factory. The test items include 2.3.2, 2.4, 2.5, 2.6, 2.6.1 of this standard. 3.3.1 Main equipment used in factory test. 3.4 The type test items of the switch shall include the provisions of 1.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6, and 2.3.7 of this standard in addition to the factory test items. 3.5 The switch shall be type tested under the following conditions. a. Trial production of new products (including conversion of old products); b. When product design, process or materials used affect product performance; c. When the product that was stopped production resumes production again; d. Mass-produce products in batches and conduct regular spot checks. 3.6 The switches used for type test shall be arbitrarily selected from the products that passed the factory test, and each test item shall be no less than 2 3.7 Except as provided in this standard, other test methods are in accordance with GB 98-82 "Basic test methods for low-voltage electrical appliances". 4 Marking, packaging, transportation, storage 4.1 Each switch must have a nameplate and the following signs. a. Model and name of the switch; b. main parameters; c. Manufacturer name. 4.2 The packing box should be sturdy, shock-resistant, and moisture-proof and dust-proof. 4.3 The outer wall of the packing box shall have the following signs. a. Switch name and model; b. year of delivery; c. the name of the manufacturer; d. Net weight and gross weight (kg); e. Handle carefully, arrow ↑, do not get wet, etc. 4.4 The technical documentation supplied with the product shall include. a. packing list; b. product certification; c. Product instruction manual. 4.5 The switch should be stored in a dry and ventilated warehouse. Additional information. This standard is proposed by the Coal Mountain Mining Lamp Factory. This standard was drafted by Meishan Mining Lamp Factory. The main drafters of this standard. Dong Lijie Hu Feilong. ......

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