7
Instruction Leaflet
IL157002EN
Effective July 2019
Eaton BLR-ACX
Quick commissioning guide
EATON
www.eaton.com
PF value shows unity or does not change even after steps
are engaged
1 . Location of CT is incorrect . Ensure that the CT is connected
electrically ahead of the capacitor bank (at the service entrance
panel or switchgear) and is not connected on the feeder that
supplies power to the capacitor bank .
2 . Steps have failed .
Incorrect measurement values
1 . Check that CT and PT ratios are programmed correctly in
Menu 100 .
2 . Check that Nominal voltage is programmed correctly in
Menu 100 .
Controller not switching on additional steps and does not
reach target PF
This usually happens when the amount of capacitance available does
not match the amount of kvar required . This can happen especially
in low load situations when the amount of kvar required is very
low compared to the smallest available step size (for example,
total kvar required is 12 kvar and the smallest step size available
is 60 kvar) . The controller will not bring on any step to prevent
overcompensation .
1 . Check that the sensed and programmed capacitor step sizes are
set and match the actual value .
2 . Check that the setting in 314 is set to N .
3 . Check the amount of shortfall kvar (
▲
Q) in the measurement
menu and program this value in menu 312 .
4 . If all above fails, one may need to install smaller kvar size steps
to allow the controller to switch them during low demand .
BLR-ACX controller technical data
Description
Specification
Measuring and
supply voltage
90–550 Vac, single-phase, 45–65 Hz, 5 VA,
max. fuse 6 A VT-ratio from 1.0 to 350.0
Current measuring
15 mA – 6 A, single-phase, burden 20 mohm,
ct-ratio from 1 to 9600
Control exits
Up to 14 relays, n/o, with common point, max. fuse 6 A
breaking capacity: 250 Vac / 5 A
Temperature measuring
By NTC
Alarm contact
Relay, volt free, life contact, max. fuse 6 A,
breaking capacity: 250 Vac / 5 A
Interface
TTL, rear
Ambient temperature
Operation: –20 °C to 70 °C, storage: –40 °C to 85 °C
Humidity
0–95%, without moisture condensation
Voltage class
II, dirt class 3 (DIN VDE 0110, part 1 / IEC 60664-1)
Conformity and listing
,
,
Connection
Pluggable terminal block, screw type max. 4 qmm
Case
Front: instrument case PC/ABS (UL94-VO), Rear: metal
Protection class
Front: IP50, (IP54 by using a gasket), Rear: IP20
Retrofit installations with
BLR-ACX controller
Please retain and follow all instructions and safety precautions
during and after installation .
1 . Compare voltage and current ratings of BLR-ACX with data of
mains and installation .
2 . Mount the relay in the control panel with the two mounting clips .
3 . Connect protection GROUND to PE connection of metal case .
4 . BLR-ACX is to be connected according to the wiring diagram .
5 . Ensure that the short-link for CT input signal is removed .
6 . Typical wiring diagram of the controller is shown below . This
may not match the existing installation . Please consult Eaton for
retrofitting this into existing Eaton capacitor banks .
load
K
L
Um1 Um2
A
M
MS
1
14
1-14
T1
T2
external
temperature sensor
or temperature switch
(parallel use of sensor
and switch is possible)
up to 14
control exits
control exits can
be parametered
for fan control
signal:
in order
(life-contact)
K1
K14
K1-K14
L1
L2
L3
N
PE
BLR-CX
TTL
Interface
X/1A or X/5A
10mA - 6A
90V - 550V
power-input
utility
Figure 4. Wiring diagram
Troubleshooting
Symptom
Correction
No control power
Check primary control fuses (three fuses located in
fuse holder) and secondary fuse located on control
transformer.
Check disconnect or circuit breaker is ON.
Check GFCI located on control panel inside cabinet.
Check the reactor thermal switches status
(open if operated, closed if healthy).
Displayed power factor
is obviously wrong or
decreases as stages engage
CT secondary current is too low (check CT tap
setting and plant load).
CT polarity is incorrect or leads are reversed.
Stages do not engage
and target power factor
has not been reached
Confirm that an inductive power factor is being
displayed (i.e., ‘i.73’, not ‘c.73’).
Confirm that the required reactive power is at least
60% of the smallest step size available for switching.
Confirm availability of capacitor stages and there is
no stage alarm.
Confirm “AUTO” is being displayed on the controller.
Blown fuse lights on
front cabinet are lit
(w/no blown fuses)
Check 3 primary control fuses (on control panel) if
check system voltage matches the nameplate voltage.
Displayed power factor does
not change as stages engage
Review ‘Current transformer placement and connection’
Controller troubleshooting
Refer to “Controller setup procedure” section.
