ETGR21 / ETGR22 — DC switchgear 750/1500 V for traction substations
ETGR21 and ETGR22 are metal-clad DC switchgear for 750 and 1500 V traction substations with rated current up to 6000 A. The HSCB breakers, ETCPU200 relays and disconnectors are made by the company itself. The sets are used in metros, tram networks and DC railways.
- Rated voltage
- 750 V DC (max. 900 V) / 1500 V DC (max. 1800 V)
- Rated current
- 3000 / 4000 / 6000 A
- Insulation
- 1800 / 3000 V DC; 8.3/6.9 and 11/9.2 kV AC
- di/dt
- 30.7·10⁶ / 24.2·10⁶ A/s
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
ETGR21 and ETGR22 are metal-clad and designed for traction power supply systems of 900 V DC and 1800 V DC, that is, rated 750 and 1500 V. Depending on the voltage level they are made for 4000 and 6000 A, and the manufacturer's table gives the series 3000/4000/6000 A. The units are also suitable for powerful industrial DC networks. In 2010 the company's DC switchgear received the Korean World-Class Product award and was supplied for Korean metros and abroad.
The main apparatus of the switchgear, namely the high-speed breaker HSCB, the protection relay and the disconnector, is made by the company itself, so the components are matched to each other. Free-standing cubicles of welded construction are designed for decades of operation. Insulators withstand the required clearances, and non-metallic partitions protect metal parts from arc ejection. The HSCB stands on a withdrawable truck, and arc extinction is enhanced by a magnetic blow-out (blow coil). The state of the apparatus is shown by on/off indicators, lamps and a mimic diagram. In an emergency the HSCB can be closed manually, but only during racking in or out, and the disconnector is operated manually without power.
Rated voltage of the ETGR21 and ETGR22 is 750 and 1500 V DC, maximum 900 and 1800 V, insulation voltage 1800 and 3000 V DC. The power frequency test voltage is 8.3/6.9 kV and 11/9.2 kV respectively. Rated breaking overvoltage is 1.5–2 times the rated voltage. The operating cycle is O-15 s-CO-15 s-CO-60 s-CO, and the current rise rate di/dt is 30.7·10⁶ and 24.2·10⁶ A/s. Endurance is at least 40 000 operations, control voltage 110 V DC / 220 V AC, release setting 2–8 / 6–12 kA, degree of protection above IP31.
The standard interface of the switchgear is the protection relay ETCPU200 with HMI, built to IEC standards. It implements the di/dt, ΔI, 76D, 32, 80, 64D, 64P protections and other functions for the DC traction network. The HMI quickly displays voltage, current and the thermal state of the line, and settings are changed from the HMI or through software. Control is local and remote via SCADA. Type tests were carried out at KERI and IPH under IEC 61992. Typical sites are traction substations of metros, trams, light metro and DC railways.
Technical specifications
| Rated voltage | 750 V DC (max. 900 V) / 1500 V DC (max. 1800 V) |
|---|---|
| Rated current | 3000 / 4000 / 6000 A |
| Insulation | 1800 / 3000 V DC; 8.3/6.9 and 11/9.2 kV AC |
| di/dt | 30.7·10⁶ / 24.2·10⁶ A/s |
| Cycle | O-15 s-CO-15 s-CO-60 s-CO |
| Endurance | 40 000 operations |
| Degree of protection | > IP31 |
| Composition | HSCB, ETCPU200 relay + HMI, disconnectors made by the company |
| Standard | IEC 61992 |
Request a price and lead time
ETGR21 / ETGR22 — DC switchgear 750/1500 V for traction substations. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8537 20 91 00 |
|---|---|
| HS, 6 digits | 8537 20 |
| CN (EU) | 8537 20 91 |
| HTSUS (USA) | 8537 20 00 00 |
| China customs tariff | 8537 20 90 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What is the difference between the ETGR21 and ETGR22?
The ETGR21 is designed for 750 V DC with a maximum of 900 V, the ETGR22 for 1500 V DC with a maximum of 1800 V. The insulation voltage is 1800 and 3000 V DC respectively.
Which protection functions does the ETCPU200 relay implement?
The relay performs the di/dt, ΔI, 76D, 32, 80, 64D and 64P protections. Settings are changed through the HMI or software.
What degree of protection and endurance do the ETGR switchgear have?
The degree of protection is above IP31 and the endurance is at least 40 000 operations. Type tests were carried out under IEC 61992.
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