29
28
z
Monitoring various data on L.C.D.
OCR can monitor,
• Phase current (A) of
I
1
,
I
2
,
I
3
and their max. peak current
• Current (A) of
I
N
,
I
g
• Line voltage (V) of
V
12
,
V
23
,
V
31
and their max. peak voltage
(or, Phase voltage (V) of
V
1N
,
V
2N
,
V
3N
and their peak volt-
age)
• Active power max. (kW)
• Demand active power max. (kW)
• Power factor (cos ø)
• Electric energy (kWh/ MWh/ GWh)
• Frequency (Hz)
• Trip history
Fault current is monitored, and the operation cause is indi-
cated on LCD and via individual contacts.
Note 1: The supply voltage to the OCR for indicating the main circuit voltage or
power must not exceed 250 VAC. If the main circuit voltage exceeds
250 VAC, a step-down power transformer is needed. When ordering
the ACB, state the step-down ratio of the transformer you will use.
x
Gives the system alarm with number on the LCD
for the following abnormal function.
• Trip function fail
• MHT circuit break
OCR with advanced L.C.D. display, type AGR-31B (contact Terasaki for details)
Operation indication function
Current (A)
Voltage
z
Single contact
x
Individual contacts
(V)
Resistive load Inductive load Resistive load Inductive load
AC
250
8
3
0.5
0.2
250
0.3
0.15
0.27
0.04
DC
125
0.5
0.25
0.5
0.2
30
5
3
2
0.7
Note 1: To reset the motion indication, press the reset button.
Note 2: The contact will turn off after 500 ms or more. Use a self-hold circuit.
Note 3: Only one function can be selected from OH, NS, REF or trip indication.
Selection of two or more functions involves manual connection of their
control circuits (custom configuration). Contact Terasaki for details.
Note 4: Only one function can be selected from PTA2, UV or spring charge indi-
cation. Selection of two or more functions involves manual connection of
their control circuits (custom configuration). Contact Terasaki for details.
Note 5: Motion indication contacts are commonly used for ST and INST/MCR.
¶
1: A switch is used to indicate the ACB has been tripped. This switch is activated
whenever the off button, the overcurrent trip device, shunt trip device or
undervoltage trip device is activated.
Operation indications
õ
: Self-hold (Note 1)
~
: Auto-reset
¢
: status indication
|
: Not applicable
c
-1
Contact ratings of Trip indicator and Spring charge indicator
Voltage
Switch contact ratings (A)
(V)
Resistive load
Inductive load
AC
250
3
3
250
0.1
0.1
DC
125
0.5
0.5
30
3
3
Specifications
4
c
-2
Contact ratings for other contacts
Protective characteristic
L/R-characteristic
S-characteristic
Function
LCD
Contact
LCD
Contact
LT
E
NP
õ
õ
õ
õ
õ
õ
õ
õ ~
(Note 2)
~
~
(Note 2)
ST
õ
(Note 2
and 5)
INST/MCR
õ
õ
|
|
|
|
|
|
GF (Ground fault) or
ELT (Earth leakage)
OH (Contact
temperature monitoring)
|
NS (Reverse phase)
(Note 3)
¢
~
~
REF (Line side GF)
¢
~
~
¢
¢
~
¢
~
Trip indication
¶
1
õ
¢
õ
õ
õ
RPT (Reverse power trip)
PTA (Pretrip alarm)
PTA2 (Pretrip alarm)
UV (Undervoltage alarm)
(Note 4)
Spring charge indication
System alarm
õ
õ
¢
õ
|
¢
~
~
¢
¢
õ
õ
õ
õ
õ
õ
õ
(Note 5)
z
Indication via single contact (AGR-11B)
When the LT, ST, INST or GF trip function is activated, an out-
put is generated via 1a-contact.
The 1a-contact will turn off after 40 ms or more.
A self-hold circuit is needed.
x
Indication via individual contacts (AGR-21B, 22B, 31B)
When the LT trip, ST trip, INST/MCR trip, GF trip, ELT, RPT,NS,
REF, UVT, pre-trip alarm, or contact temperature monitoring
function is activated, LCD will indicate their operation individu-
ally and output is generated via the corresponding contact.
The OCR also has a self-diagnostic feature that monitors the
internal tripping circuits. If detecting any fault in the circuits,
this feature turns on the system alarm indicator. The control
power is needed.
