TERASAKI TemPower 2, Инструкция по эксплуатации

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KRB-5404 43
Table 21 Specifications of type AGR-21B, 22B, 31B OCR
(

: Standard,

: Optional, –: Not applicable)
Application For general feeder For generator protection
Reference
section
Characteristic L R S
Type designation
AGR-
21BL-XX
AGR-
31BL-XX
AGR-
21BR-XX
AGR-
31BR-XX
AGR- XXXX -
XX
AGR-
31BS-XX
Suffix (XX or XXXX) of type designation PS PG PS PG PS PG PS PG
21BS
-PS
22BS
-PR
PS PR
Protective
function
Long time delay trip (LT), short time delay trip (ST) and
Instantaneous trip (INST/MCR)
○
1
           
5-2.,
5-3-2-6.
Ground fault trip (GF)
○
2
○
3
–  –  –  –  – – – –
5-2.,
5-3-2-7.
Reverse power trip (RPT)
○
2
○
4
○
5
– – – – – – – – –  – 
N-phase protection (NP)
○
1
○
6
        – – – –
5-2.,
5-3-2-6.
Negative-phase sequence protection (NS)
○
2
○
7
        – – – –
5-2.,
5-3-2-7.
Line side ground fault protection (REF)
○
2
○
3
○
8
○
9
–  –  –  –  – – – –
Contact overheat monitoring (OH)
○
2
○
9
○
10
– –   – –   –   
Zone interlock (Z)
○
9
○
11
– –   – –   –   
3-3.
Alarm function
Pretrip alarm (PTA)
○
9
○
12
○
13
           
5-2.,
5-3-2-7.
Pretrip alarm 2 (PTA2)
○
9
○
12
○
13
– – – – – – – – –   
Undervoltage alarm (UV)
○
5
○
9
○
12
○
14
– –
 
– –
 
–
  
Protection
characteristic
COLD/HOT (LT)
○
15
   
－ － － － － － － －
5-2.,
5-3-2-6.
I
2
t ON/OFF (ST)
○
16
           
INST/MCR (Instantaneous trip)
○
17
           
I
0.02
t/It/I
2
T/I
3
t/I
4
t (LT)
○
18
– – – –     – – – –
I
2
t ON/OFF (FG)
○
16
–  –  –  –  – – – –
5-2.,
5-3-2-7.
Polarity NOR/REV (RPT)
○
19
– –   – –   –   
5-3-2-4.
Operation
indication
Indication on LCD and contact output (individual indication)
○
9
           
5-5-2.
Measurement
/event
indication
Present current (switchable between respective phase current
phase max. and current)
○
9
  – –   – –   – –
5-3-2-3.
Present current /voltage/electrical energy/frequency(switchable
between respective phase current phase max. and current)
○
9
– –   – –   – –  
Max. current (max. phase current)
○
9
  – –   – –   – –
Max. current /demanded power(max. phase current)
○
9
– –   – –   – –  
Trip event log (last trip event)
○
9
○
20
           
5-3-2-8.
Alarm event log (last alarm event)
○
9
○
20
           
Communication Functions
           
3-3.
External indicator
– –
 
– – 

–   
-
Test function
○
9
○
21
           
5-4.
Control power supply
○
22
Required 3-3.
○
1
Two modes are available; one where the ACB is tripped open and operation indication is provided and the other where the ACB i s not tripped and no operation indication is
provided. Fail-safe against failure in setup (see 5-2).
○
2
Three modes are available; the first where the ACB is tripped open and operation indication is provided, the second where the ACB is not tripped and only operation indication is
provided, and the third where the ACB is not tripped open and no operation indication is provided.
○
3
Residual current sensing. When a 3-pole ACB applies to a 3-phase, 4-wire circuit, be sure to use the separate N-phase protection CT (see 3-3).
○
4
Allows 3-phase generators operated in parallel to be protected against reverse power.
○
5
If the main circuit voltage exceeds AC250V, a step-down PT (potential transformer) is needed.
○
6
Provides protection to the neural conductor in a 3-phase, 4-wire circuit against overcurrent. This function applies to a 4-pole ACB.
○
7
Provides protection to ACBs against negative-phase current caused by phase loss or reverse phase, preventing damage to loads.
○
8
The line side ground fault protection capability allows the ACB to trip open when transformer windings or cables on the line side suffers a ground fault in TN-C or TN-S power
distribution systems where the line side neutral is grounded.
○
9
Control power supply is required. Disabled when control power is lost.
○
10
Protects the breaker main contact against overheat, preventing troubles caused by thermal damage of the contact. Helpful for preventive maintenance.
○
11
Zone selective interlock implemented between ACBs in a hierarchical system allows the upstream ACB nearest a fault point to trip open in a minimum time, irrespective of short
time delay trip or ground fault trip pickup timing, thereby minimizing thermal or mechanical damage to loads. This stands for selective discrimination with zero timing.
○
12
Two modes are available; one where operation indication is provided and the other where no operation indication is provided.
○
13
The pretrip alarm capability provides an alarm on the LCD and delivers contact output when it is detected that the current value exceeds the current setting for longer than the
time setting, thereby preventing the ACB from tripping due to a gradual increase in load current. Pretrip alarm 2 allows two different timings to be set and helps regulate loads
depending on their importance.
○
14
Provides an alarm on the LCD and delivers contact output when the voltage of the main circuit becomes low.
○
15
In HOT mode, the OCR is actuated in shorter time than in COLD mode when an overload occurs after a certain degree of load is maintained for a certain time of period. This
mode helps protect heat sensitive loads.
○
16
I
2
t ON avoids intersection of characteristic curves of the ACB and e.g., a downstream fuse. This will improve selective discrimination flexibility.
○
17
INST is enabled, the OCR trips open the ACB when the trip pickup current is reached or exceeded, irrespective of the ACB status. When MCR is enabled, the OCR trips open
the ACB when the ACB making current setting is reached or exceeded, and after tripping operation, it locks the ACB in the open state. MCR provides the INST function if the
control power is lost.
○
18
Helpful for protection in coordination with fuses or the like. (IEC 60255-3)
○
19
Allows selection of the power supply terminal position between upstream and downstream of the breaker.
○
20
Logs the latest trip event and alarm event and allows displaying the cause, fault current value and operating time of the events.
○
21
Allows simplified field testing where simulation signals from/to the OCR are used to check for normal long time delay, short time delay, instantaneous and ground fault trip
functions.
○
22
If the control power is lost, the long time delay trip, short time delay trip, instantaneous trip, ground fault trip, reverse power trip, N-phase protection and negative-phase
sequence protection functions are alive.