Introduction 9
1 Introduction
The reactive power control relay RM 2112
and RM 2106 respectively is capable of
measuring the reactive power and active
power of the connected mains network.
Working in conjunction with a power factor
correction system, the device controls the
programmed target power factor by activating
or deactivating capacitors.
1.1 How to use these operating
instructions
Important:
It is essential that you read section 2 “Instal-
lation 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 relay setup”.
Section 5 „Functioning and operation“
explains how the control relay works and how
to operate it.
Section 6 „Alarms and troubleshooting“
describes alarms and error messages 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 factor
- overcurrent in the capacitor
- defects at capacitor stages
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