SPChRS type frequency converters (HV drive synchronous motors)

Electric motors rated power: 1200 – 25 000 kW

Electric motors rated power: 1200 – 25 000 kW

Electric motors voltage: 6; 10; 13.8; 15.75 kV

Electric motors voltage: 6; 10; 13.8; 15.75 kV

Nominal outgoing current: 150 – 1000 А

Nominal outgoing current: 150 – 1000 А

Frequency regulation range: 5-51 Hz

Frequency regulation range: 5-51 Hz

Energy saving at each start of one engine is tens of kW / h

Energy saving at each start of one engine is tens of kW / h

SPChRS high-voltage frequency converters are designed for frequency starting, rotational speed regulation, smooth (fluent) switching to a feeding network and braking of powerful synchronous motors.

One converter with 630-800A output current can provide simultaneous group starting of up to 4 to 6 non-loading electric drive units with CTD-12.5 engines over 1.5 to 2 minutes or 2 to 3 electric drive units with CTD-25. The converter is connected to the 6/10 kV network through the use of input current suppressing reactors, or under different rated network voltage through matching transformers.

The efficiency of SPChRS use as a component of variable frequency synchronous electric drives is allowed in order to save electricity, especially in a wide range of required rotational speed regulations (0.2 – 1.1 of the rated value).

SPChRS provides an automatic starting regime, a regime of electric drive acceleration up to synchronization with network frequency at the set pace, a regime of exact synchronization with network frequency and phase without inrush switching to the network, a regime of smooth (fluent) regulation and stabilization of engine rotational speed in a wide range, and regenerative braking up to the set frequency.

The converter has a developed protection system and a control and diagnostics system, thus making its operation easier.

Over the last several years ESTEL has continued to manufacture SPCHRS in accordance with special orders for parameters different from those listed in the table: for example, 15.75 kV/630 A, 10kV/160A etc.

Field of application:

  • Compressors, fans, pumps in petroleum chemistry
  • Synchronous compensators in power industry
  • Pumps of water supply and power and heat supply systems
  • Fans and compressors in aerodynamics research systems etc.

The parts of SPChRS are as follows:

  • Set of cabinets (rectifier, inverter, control cabinet, resistor cabinet) installed in line
  • Current suppressing and smoothing reactors
  • Overvoltage suppressing device
  • Set of spare parts and adjustment devices for checking the control system.
SPChRS
15750/1000
15750/800
10000/500
10000/100
6000/630
6000/400
6000/200
Nominal output rated power, kW
25000
19200
8000
1600
5000
3200
1600
Nominal input and output current, A
1000
800
500
100
630
400
200
Nominal input and output voltave, V
15750
15750
10000
10000
6000
6000
6000
Nominal frequency of the supply voltage, Hz
50
Output frequency diapazone:
0,1 — 60,0
Output frequency stabilization accuracy in the range of 0.5 - 1.2 of the nominal,%
2
 
 
Overload current the nominal value and the time permissible overloads, sec:
   — within 5 sek
200%
   — within 40 sek
150%
   — within 5 min
120%
 
 
Output frequency adjustment range:    - in working mode
01:10
    — working regime
01:30
Cooling 
air
 
manufactured manufactured manufactured natural manufactured  manufactured natural
Efficiency in nominal mode,%  97% 

Dimensions (WxHxD), (no reactor included), mm:

12000 х 1000 х 2200
12000 х 1000 х 2200
5000 х 1000 х 2200
5000 х 1000 х 2200
3800 х 1000 х 2200
3800 х 1000 х 2200
3800 х 1000 х 2200
Weight, kg
8500
8300
6700
5400
3200
2800
2700

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