Novatek THREE-PHASE POWER LIMITER OM-310 OM-310 データシート
製品コード
OM-310
- 17 -
NOVATEK-ELECTRO
ОМ-310
When power-on inhibiting factors are not present, the load relay closure is defined by APd parameter value
(
ОМ-310 device operation after power-on) At =0 the load relay will not close. To close load relay in this
case both DOWN and UP buttons have to be pressed simultaneously.
1) When
=1 the load relay will close after AR time.
2) When
=2 the load relay will close in 2 sec after power-on.
Simultaneously with the load relay closure, green LED LOAD starts to glow.
ОМ-310 operation with remote control permitted via RS-232/RS-485 (=1, =2) is covered in paragraph 2.4.5.
ОМ-310 operation with remote control permitted via RS-232/RS-485 (=1, =2) is covered in paragraph 2.4.5.
ОМ-310 operation with remote control permitted via switch (c=1, c=2) is covered in paragraph 2.4.6.
2.4.1.2.
ОМ-310 operation after a fault-caused de-energizing
The
ОМ-310 device operation in such case is similar to the first start operation , but the load relay closure is not
dependent on the
parameter value.
If after a fault AR is prohibited (“
=0”), the load power-on is not possible before
ОМ-310 de-energizing.
parameter value is effective for all types of faults except voltage faults.
,
=
,
parameters shall be
used to prohibit AR in case of voltage faults.
2.4.1.3.
ОМ-310 operation after de-energizing tripping caused by excceding the watt input
ОМ-310 operation in this case is covered under par. 1.2.5.
2.4.2 OM-310 operation before load relay closure
After load relay closure ОМ-310 performs the following:
- control and limiting the active and wattles power by input load wattage (1.2.5);
- current overload protection (1.2.6.3);
- protection against line-to-earth fault (1.2.6.4);
- voltage protection (maximum, minimum, phase imbalance) (1.2.6.5);
- control and limiting the active and wattles power by input load wattage (1.2.5);
- current overload protection (1.2.6.3);
- protection against line-to-earth fault (1.2.6.4);
- voltage protection (maximum, minimum, phase imbalance) (1.2.6.5);
- starter unit operability control (1.2.6.6).
The indicator can display either phase A current or a user-selected parameter value. The value of the user-
selected parameter can be displayed either constantly (
=0), or within 15 sec, and then phase A current (=1)
indication is displayed again.
2.4.3 Characterizing relay operation
Functions performed by the characterizing relay are defined by
Functions performed by the characterizing relay are defined by
parameter.
When
=0, the relay functions as signaling alarm relay (
and TR LEDs are off). The relay contacts are
closed in case of any fault specified in Table 2.7.
When
=1, the relay functions as time relay (TR LED glows): the relay closes upon expiration of time set by
“
” parameter, after load relay closing.
When
= 2, the relay is used to control switching additional load ( LED glows) (1.2.5.3).
When
=3 we use relay for exceedence signalization of reactive power (LEDs
and TR are )
Functional relay is switched ON by exceedence of total reactive power across tree phases –
(admissible
reactive power of loading) and switched OFF if not exceedence.
When
=4 we use relay for exceedence signalization of reactive power main threshold (LED is blinking)
(p.1.2.5.4.) The threshold value is being calculated according p.1.2.5.2.
N o t e - When the characterizing relay is closed, contacts 1-2 are open, and contacts 2-3 are closed.
2.4.4 Work with RS-232/RS-485 interface under MODBUS protocol in RTU mode.
The OM allows for data exchange with an external device via serial interface under MODBUS protocol. During
The OM allows for data exchange with an external device via serial interface under MODBUS protocol. During
data exchange via RS-485 or RS-232 blue LED “EXCHANGE” glows.
2.4.4.1 Communication parameters:
- device address: 1-247 (
- device address: 1-247 (
parameter);
- data transfer rate: 9600 baud, 19200 baud (
parameter);
- response to loss of carrier: warning and continue operation, warning and load de-energizing, continue opera-
tion without warning (
parameter);
- response timeout detection: 1sec –120sec (
parameter);
- transmission word format – 8 bit, no parity check, two stop bits.
2.4.4.2
2.4.4.2
ОМ-310 control from PC
Communication between PC and
ОМ-310 is effected through serial interface. The connection schematic is
shown in fig. 2.2. Each
ОМ-310 has a unique communication address. PC controls each OM recognizing them by
their address.
OM-310 can operate within RTU mode controlled Modbus networks.