EJ-STS series intelligent static transfer switch realizes fast switching within 20ms between grid-connected and off-grid states. Under normal working conditions, the STS is closed; when the utility power is interrupted, the STS is immediately disconnected, and the system switches to the off-grid power supply, and the battery discharges the load. STS has the characteristics of intelligent switching, fast response, redundant design, and convenient maintenance.

Rated power: 80~800kW
Rated voltage: 400Vac
Grid frequency: 50/60 ± 10%

1. Overview

When the energy storage system needs to provide backup power for important loads, the energy storage system needs to be equipped with STS to disconnect the energy storage system and important loads from the grid when the grid is powered off. In this way, energy storage can provide uninterrupted backup power for critical loads.

2. Features

  • Intelligent: intelligent operation, with CAN, 485, Ethernet and other communication interfaces;
  • Response: Smart and fast separation of power grid and micro grid, switching power supply circuit (≤20ms)
  • Reliable: High-reliability backup design (parallel design of fast switch and bypass switch) to ensure that important loads are not interruptedConvenience: front maintenance design, easy to operate and maintain

3. Product Size

4. Product specification

Model ESTS200-M ESTS500-M
Max. efficiency >99.5%
AC output topology 3W+N/3W
Rated power(kW) 200 500
Max. Apparent power(kVA) 205 550
Rated voltage(V) 220/380,230/400
Max. Current(A) 318 794
Rated voltage(V) 400
Frequency(Hz) 50/60
On to off-grid switching time(ms) 20
Off to on-grid switching time(ms) 0
Overvoltage protection yes
Overcurrent protection yes
Frequency monitoring yes
Phase monitoring yes
General data
Operation Temperature(℃) -25~+60
Relative humidity 0%RH~95%RH
Max. Altitude(m) 4000(2000 derating)
Cooling mode Air cooling
Communication RS485/CAN
Weight(kg) 22 32
Dimensions W*D*H(mm) 440*425*232 440*500*232
Protection class IP20

4. Typical application

Work with the energy storage ACDC module to form an energy storage system to provide backup power for key loads.

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