SPChRS type frequency converters (HV drive synchronous motors)

spchrsElectric motors rated power: 1200 – 25 000 kW

 

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

 

Nominal outgoing current: 150 – 1000 А

 

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.

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.

 

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.

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.

 Characteristics:

SPChRS
-15750/1000
SPChRS
-15750/800
SPChRS
-10000/500
SPChRS
-10000/100
SPChRS
-6000/630
SPChRS
-6000/400
СПЧРС

-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
Overload current the nominal value and the time permissible overloads, sec:
    — within 5 sek 200%
    — within 40 sek 150%
    — within 300 sek 120%
Output frequency adjustment range:
    — working regime 01:10
    — starting regime 01:30
Cooling  air
  manufactured manufactured manufactured natural manufactured manufactured natural
Efficiency (calculated), not less, % 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
Weigh, kg 8500 8300 6700 5400 3200 2800 2700