- AC Motor[3]
- Power Distribution Equipment[10]
- Other Switches[7]
- Circuit Breakers[1]
- Fuses[7]
- Fuse Components[4]
- Frequency Meters[3]
- Energy Meters[5]
- Voltage Meters[2]
- Multimeters[1]
- Voltage Regulators/Stabilizers[1]
- Relays[1]
- Switching Power Supply[4]
- Contact Person : Ms. Du Jean
- Company Name : Chongqing Yueda Electric Equipment Co., Ltd.
- Tel : 86-23-86973095
- Fax : 86-23-86973092
- Address : Chongqing,Jiangbei District,5-1, 5 F, Building 5, No. 2, Gangcheng East Road, Jiangbei District, Chongqing, China
- Country/Region : China
- Zip : 400026
YD-891 Microcomputer Earth Transformer Low-voltage Side Protection Device, Digital Protection Relay
Description
YD-891 microcomputer earth transformer low-voltage side protection device integrates protection, measuring and controlling, which can be used to protect and control the 3-10kV earth distribution transformer low-voltage side and incoming line standby auto-switch for spare power supply for 400V factory power system. It has function of tele-control, tele-metering, tele-signaling and tele-adjusting.
Function
1.) Three approaches of standby auto-switching functions.
2.) 1# grounding transformer definite-time overcurrent protection.
3.) 2# grounding transformer definite-time overcurrent protection.
4.) 1# grounding transformer overload protection.
5.) 2# grounding transformer overload protection.
6.) 1# grounding transformer closing post-acceleration protection.
7.) 2# grounding transformer closing post-acceleration protection.
8.) 1# grounding transformer no-voltage tripping.
9.) 2# grounding transformer no-voltage tripping.
10.) Phase-break alarm on low-voltage side of 1# grounding transformer.
11.) Phase-break alarm on low-voltage side of 2# grounding transformer.
12.) Over-voltage alarm on low-voltage side of 1# grounding transformer.
13.) Over-voltage alarm on low-voltage side of 2# grounding transformer.
14.) 8 events recordings.
YD-891 Microcomputer Earth Transformer Low-voltage Side Protection Device, Digital Protection Relay