7
1. Introduction
The reactive power control relay RM
2112 and RM 2106 respectively is capa-
ble of measuring the reactive power and
active power of the connected mains
network. Working in conjunction with a
power factor correction system, the de-
vice controls the programmed target
power factor by activating or deactivating
capacitors.
1.1 How to use these operating in-
structions
Important:
It is essential that you read section 2
“Installation and connection” and
section 3 „Start-up“ before installing
the control relay.
The functions of the control relay are also
described in brief in section 1.2 „Scope
of functions“.
The setting options for the control relay
are described in section 4 „Control re-
lay setup”.
Section 5 „Functioning and operation“
explains how the control relay works and
how to operate it.
Section 6 „Alarms and troubleshoot-
ing“ describes alarms and error mes-
sages of the control relay. Troubleshooting
information is also provided there.
1.2 Scope of functions
Below is a brief overview of the various
functions of the device:
•
12 switching contacts at RM 2112 and
6 switching contacts at RM 2106
•
Power factor display
•
Total harmonic distortion factor display
(voltage thd)
•
Semi-automatic connection detection
•
Automatic detection of the capacitor
stages
•
Comprehensive connection analysis
•
Patented characteristic avoiding over-
compensation for low active power
•
Four-quadrant regulation
•
Cyclic switching of all capacitor stages
of the same capacity
•
Reactive
power
requirement-
dependent switching delay time
•
Optional monitoring of the harmonic
overcurrent in the capacitor
•
Deactivation at zero voltage or zero
current
•
Alarm signals for:
- failure to reach the target power fac-
tor
- overcurrent in the capacitor
- defects at capacitor stages
