- 4 -
ОМ-310
NOVATEK-ELECTRO
1.1.3 Integrated relays output terminals specification
The internal relays output terminals specifications are outlined in Table 1.1 and Table 1.2
Table 1.1
- Load relay
Max. current
for U~ 250 V
Number of trips
х
1000
Max switching
power
Max sustained safe
AC/DC voltage
Max. current for
U = 30V D.C.
Cos
ϕ
= 0.4
Cos
ϕ
= 1.0
5 А
8 А
200
100
1000 V
А
440/125 V
1.3 А
Table 1.2
- Characterizing relay
Max. current
for U~ 250 V
Number of trips
х
1000
Max switching
power
Max sustained safe
AC/DC voltage
Max. current for
U
пост
= 30V D.C.
Cos
ϕ
= 0.4
Cos
ϕ
= 1.0
5 А
16 А
400
100
4000 V
А
440/125 V
3 А
1.1.4 List of abbreviations used
AR – automatic reset
M
С
– magnetic contactor
PC - personal computer
CT – current transformer
MMSP – mode with minimal number of setting parameters
Itt - rated current of CT. (Specified when external CTs are used. For example, if a CT of T type-0.66 300/5, then
I
tt
will equal 300
А
)
In - rated current of load.
1.2 TECHNICAL BRIEF
1.2.1 Basic technical parameters
are shown below in table 1.3
Table 1.3 -
Basic Technical Parameters
Rated supply voltage: Three-phase 380V 50Hz
Mains frequency, Hz
48-62
Rated load wattage range (during operation with use of integrated current transformers), kW
3-30
Tripping threshold accuracy for wattage, % of rated wattage, at most
5
Tripping threshold accuracy for current, % of rated current, at most
2
Tripping threshold accuracy for voltage, V, at most
3
Phase imbalance detection accuracy for voltage, V, at most
3
Minimum operational voltage:
-single-phase
voltage
power
supply
when
one
phase
and
neutral
wires
are
connected
,
V,
not
less
- three-phase power supply voltage, V, at most
180
450
Analog inputs
- remote switch connection input
- three analog inputs for connecting standard CT with 5A output (of
Т
-0.66 type or similar)
- input for connecting differential current transformer (zero sequence transformer)
Main outputs
load relay – two groups of changeover contacts -
8A 250V cos φ=1;
characterizing relay – one group of changeover contacts -16A 25
0V at cos φ=1 (the relay
function is assigned by the user);
Power consumption (under load), VA, at most
5,0
Enclosure protection degree: - frame
- terminal block
IP40
IP20
Climate zone version
У3.1 (mode
rate)
Operating temperature range, °C
from -35 to +55
Storage temperature, °C
from -45 to +70
Weight, kg, at most
0,5
Case dimensions (diagram 1.1) - nine S-type modules
Mounting onto standard 35 mm DIN-rail
Mounting position any
1.2.2 Measured and calculated parameters
output to the display unit, their effective range limits and toler-
ances are given below in Table 1.4.
Note:
The display device includes:
- two pieces of three-digit, seven segment indicators on OM-310 front panel;
