frako RM 2106/12 User manual

Operating Instructions
Reactive Power Control Relay RM 2106/12

2

3
Safety and warning notices
!!! Important !!!
Read this before commissioning!!!
• The operating instructions should be read carefully before the
device is assembled, installed and put into operation.
• Installation and commissioning should only be carried out by
appropriate specialists in accordance with existing regula-
tions and provisions.
• The operator must ensure that all operatives are familiar with
these operating instructions and proceed accordingly.
• The device conducts mains voltage and should not be
opened.
• If the device is obviously damaged, it should not be installed,
connected or commissioned.
• If the device does not work after commissioning, it should be
disconnected from the mains again.
• Any other laws, standards, guidelines, etc. regarding this
product must be observed.
The commissioning and safety information for the power factor
correction system should also be observed.

4
Figure 1: Front view
a Display for active capacitor stages
b Display for inductive or capacitive
operating status
c Digital display
d LED indicates regenerative power
e Display for current or historical
alarms
f LED lights up in setup mode
g LED lights up in manual mode
h Multifunctional button
(see operating instructions)
i Selection key for manual mode,
setup mode or automatic mode

5
Figure 2: Rear view
j Connection for the current trans-
former
k Optional connector for improved
measurement of harmonic wave
l Connector for power supply to the
control relay
m Connectors for the control contacts
that switch the contactors. The
shared pole is connected to terminal
´L´.
n Typical connection

6
Contents Page Page
1. Introduction .................................7
1.1 How to use
these operating instructions...........7
1.2 Scope of functions.........................7
2. Installation and connection.........8
2.1 Installation.....................................8
2.2 Voltage connection........................8
2.3 Current transformer connection .....8
2.4 ”Meas” measuring
voltage connection.........................9
2.5 Switching contacts.........................9
2.6 Alarm contact ................................9
2.7 Standard connection....................10
2.8 Extended connection...................11
2.9 Connection with
voltage transformer......................12
2.10 Connection in special cases ........13
3. Start-up ......................................14
3.1 Initial start-up...............................14
3.2 Subsequent start-up ....................15
4. Control relay setup....................16
4.1 Target power factor setting ..-1-...17
4.2 Overcurrent switch off..........-2-...19
4.3 Relay 6 as alarm relay.........-3-...19
4.4 Automatic response
current identification.............-4-...20
4.5 Response current ................-5-...20
4.6 Relative value
of the switch outputs............-6-...22
4.7 Service................................-7-...22
5. Functioning and operation....... 23
5.1 Automatic control mode .............. 23
5.2 Displaying the
total harmonic distortion factor .... 23
5.3 Check System ............................ 23
5.4 Manual mode.............................. 24
6. Alarms and troubleshooting .... 25
6.1 Connection errors....................... 25
6.1.1 E3 - No capacitors ................. 25
6.1.2 E1 - Defect capacitor stages.. 25
6.1.3 E2 - Incorrect connection....... 25
6.1.4 I = 0 - No current in current path25
6.2 Connection messages ................ 26
6.2.1 A2 - Incorrect connection
that can be corrected
internally......................... 26
6.2.2 A1 - Relative value of the
switch output.................. 26
6.3 Alarms in automatic control
operation .................................... 26
6.3.1 E4 - Harmonic overcurrent
in the capacitor............... 26
6.3.2 E5 - Target power factor
not reached.................... 27
6.3.3 E1 - Defect capacitor stages.. 27
6.3.4U = 0 - No measuring voltage..... 27
6.3.5 I = 0 - No measuring current..... 27
6.4 Other errors ................................ 27
6.5 Troubleshooting.......................... 28
7. Technical data........................... 29

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

8
2. Installation and connection
The reactive power control relay
RM 2112 and RM 2106 respectively can
be connected in a number of different
ways. The main connection methods are
described below.
Important information:
The control relay should be discon-
nected from the mains during
installation.
2.1 Installation
The reactive power control relay is in-
stalled from the front in a control panel
space measuring 138 x 138mm and is
fixed in place using the mounting screws
of the front panel.
As accessories (protection kit; see
section 8) insulated fixing screws are
available. These can be used to install
the control relay into switchgear cabinets
and cubicles of protective class II. Also a
sealing ring is part of the protection kit,
which must be used when installing the
control relay in switchgear cabinets and
cubicles of protection class IP 54.
The pre-assembled fixing clamps ensure
speedy and secure assembly. The elec-
trical connection is created by means of
plug-in connectors which are also in-
cluded in the delivery.
2.2 Voltage connection
Reactive power control relay obtains its
voltage supply via terminals ”L” and ”N”
(see figure 2, item ’l’).
A phase conductor is to be connected to
terminal ”L” and neutral conductor to ter-
minal ”N”. For advanced connection
variations see sections 2.7 to 2.10.
Important information:
The reactive power control relay is
designed for voltage supplies of up to
240VAC.
The connections for the supply volt-
age are to be fused externally with 4A
max.
In the case of mains networks that do not
facilitate voltage tapping in the 220VAC
to 240VAC range (either phase/phase or
phase/neutral), a voltage transformer
must be used for the power supply for the
control relay. (See section 2.9 )
2.3 Current transformer connection
Outputs S1 and S2 of the current trans-
former are connected to terminals S1 and
S2 (Figure 2, item ’j’) of the control relay.
To keep the load of the current trans-
former as low as possible, the feed lines
should have a adequate cross section.

9
It is permissible for connector S1 or S2 of
the current transformer to be grounded.
Caution:
The nominal current in the current
transformer path may not exceed 5 A.
Note:
After connection it is necessary to re-
move the short-circuit jumper on the cur-
rent transformer, if present.
2.4 ”Meas” measuring voltage con-
nection
This connection can be used to switch
the control relay to a different measuring
procedure for monitoring overcurrent
(see section 2.8 ).
This terminal ”Meas” (Figure 2, item ’k’)
is not used in the standard connection.
Important information:
The nominal voltage between the
”Meas” and ”N” connectors may not
exceed 240 VAC. The voltage between
the ”Meas” and ”L” connectors may
not exceed 420 VAC.
If ”Meas” is connected directly to a
phase conductor, then this is to be
secured externally with a maximum
of 4 A.
2.5 Switching contacts
The shared pole of all switching contacts
(Figure 2, item ’m’) is connected to ter-
minal ”L” of the voltage supply.
Important information:
The outputs of the switching contacts
do not have floating potential.
When the switching contacts are
switched, the same voltage is applied as
is used to supply voltage to the control
relay (connection ”L”).
The contactor relays of the capacitor
stages are operated (supplied) via the
switching contacts of the control relay.
2.6 Alarm contact
Switching contact 12 at RM 2112 (switch-
ing contact 6 at RM 2106) can be used
either as a control output for a capacitor
stage or as an alarm contact. The rele-
vant selection is made in setup mode
under -3-.
In the event of an alarm, switching con-
tact 6 is closed.
It should be noted that, even when oper-
ating as an alarm contact, this switching
contact continues to have potential bind-
ing to the supply voltage of the control
relay. If a floating potential contact is re-
quired, use an additional contactor relay.

10
Figure 3: Single phase connection
2.7 Single phase connection
The connection diagram above shows
the same connection as the one printed
on the back of the control relay.
The voltage signal for power factor meas-
urement is received in parallel with the
voltage supply. The terminal ”Meas” is
not in use.
In this connection variant, only the 5th,
7th, 11th and 13th harmonics of the volt-
age are used to calculate the harmonic
overcurrent in the capacitor.
This connection variant can be chosen if
the above-mentioned harmonics are suf-
ficient for monitoring overcurrent or if
overcurrent monitoring has been com-
pletely switched off (setup code -2-).
(see section 4.2)
Current transformer and terminal ”L”
should be attached to the same phase
conductor: Either L1, L2 or L3.
RM2112 / 06