User manual
Table Of Contents
- POWER LIMITER
- CONTENT
- 1. DESCRIPTION AND OPERATION
- 1.1 APPLICATION
- 1.2 Technical Brief
- 1.2.1 Basic technical parameters are shown below in table 1.3
- 1.2.2 Measured and calculated parameters output to the display unit, their effective range limits and tolerances are given below in Table 1.4.
- 1.2.3 Programmable parameters and their variability ranges are shown below in table 1.5.
- 1.2.4 Operating controls and the dimensions of the ОМ-310 are shown in fig.1.1.
- 1.2.5 Power Limiting Functions
- 1.2.6 Protection functions
- 1.3 Product package contents
- 1.4 Equipment features and operation
- Current protection. Maximum current protection
- Load Engagement and Automatic Reset Control
- 2. INTENDED USE
- 2.1. SAFETY
- 2.2 ОМ-310 device control
- 2.3 OM-310 pre-operation procedure
- INTENDED USE
- 2.4.1 ОМ-310 operation before load relay closure
- 2.4.2 OM-310 operation before load relay closure
- 2.4.3 Characterizing relay operation
- 2.4.4 Work with RS-232/RS-485 interface under MODBUS protocol in RTU mode.
- 2.4.5 The load energize/de-energize remote control via RS-232/RS-485 interface.
- 2.4.6 Load energize/de-energize via remote breaker
- 2.4.7 Fault conditions system
- 2.4.8 Faulty conditions log
- 2.4.9 Load start/cutoff control with use of OM-310 front panel
- 3. Maintenance
- 4. Transportation and storage
- 5. Period of service, storage, and manufacturer’s warranty
- Appendix 1- Dependent time delay current based protection types:
- 16 -
ОМ-310
NOVATEK-ELECTRO
4
L2_OUT2
31.5
51
T3
26
N
T1b
K1-1-nc
T1e
8
6
L1
1
Designation
K1-2-nc
GND_RS232
L1_OUT2
23
TxD_rs232
L3
T3b
K1-1-com
33
АВ
Cont
OM-310
K1-1-no
16
T1
K2-com
30
27
L2
18
T3e
3
25
Cont
cont
15
K1-1
S1
A RS-485
T2
Designation
GND
MS1
T2e
N
K1-2-no
34
Tdif_e
7
K2-no
9
28.5
X1-2
4
X2
K1-2
K2-nc
5
MS2
X1-1
K2
L1_OUT1
T4
Designation
L1
B RS-485
24
17
Cont
L3_OUT2
2
K1-2-com
T2b
Tdif_b
L3_OUT1
14
2
L2
RxD_rs232
19
L2_OUT1
35
52
3
GND
L3
S1 – remote switch
АS – automatic switch
MС1 –additional load magnetic contactor
MС2 – main load magnetic contactor
K1 relay – load relay
K2 relay – characterizing relay
Т1-Т3 –external CTs
Т4 – differential current transformer.
Figure 2.1 - ОМ-310 connection schematic with use of external CTs and at
=2
(characterizing relay operation in the mode of controlling additional load)
2.4 INTENDED USE
Note: In the ОМ-310 operation description, it is assumed that the protections described are enabled and all
necessary sensors are connected.
2.4.1 ОМ-310 operation before load relay closure
2.4.1.1. ОМ-310 operation after power-on (first start)
After power-on, the mnemonic indicator displays for 1-2 seconds, and then before load energizing ОМ-310
tests:
- mains voltage quality: whether voltage is present on all three phases, if the mains voltage is symmetrical,
what the RMS line voltage value is;
- correct phase sequence, absence of phase fritting.
When any of inhibiting factors is present, the load relay is not closed, and on the mnemonics indicator FAULT
LED glows.
Depending on the SiP parameter, the indicator displays:
- line voltage Uab at
=0;
- active power (PoA) at
=1;
- AR time countdown in seconds, (Att) while
=2.