SR / SRA — auxiliary resistors for arc-suppression reactors
SR and SRA auxiliary (secondary) resistors for arc-suppression reactors in compensated networks. They briefly increase the active component of the earth-fault current so that directional earth-fault protection operates reliably.
- Purpose
- brief increase of the active component of the earth-fault current
- Connection
- to the power auxiliary winding of the arc-suppression reactor
- SR
- fixed resistance
- SRA
- set of resistor elements switched by contactors, controlled by the ARS-01 controller
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The resistor is connected to the power auxiliary winding of the arc-suppression reactor. The SR model has a fixed resistance. The SRA is assembled from a set of resistor elements switched by contactors on commands from the ARS-01 controller. Cooling is natural air and the installation is outdoor.
Technical specifications
| Purpose | brief increase of the active component of the earth-fault current |
|---|---|
| Connection | to the power auxiliary winding of the arc-suppression reactor |
| SR | fixed resistance |
| SRA | set of resistor elements switched by contactors, controlled by the ARS-01 controller |
| Cooling | natural air, outdoor installation |
Replacement for
no direct analog; the closest are resistors for arc-suppression reactors РЗДПОМ (generic type)
selected by purpose and main parameters, please confirm with our manager
Request a price and lead time
SR / SRA — auxiliary resistors for arc-suppression reactors. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8533 40 90 00 |
|---|---|
| HS, 6 digits | 8533 40 |
| CN (EU) | 8533 40 90 |
| HTSUS (USA) | 8533 40 80 70 |
| China customs tariff | 8533 40 00 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
How do the SR and SRA resistors differ?
The SR has a fixed resistance. The SRA consists of a set of elements switched by contactors under the control of the ARS-01 controller.
Where is the auxiliary resistor connected?
To the power auxiliary winding of the arc-suppression reactor.
Why is an auxiliary resistor needed in a compensated network?
It briefly increases the active component of the earth-fault current, and the directional protection reliably identifies the faulted feeder.
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