HUYU HUM8 Series, Installation And Operation Instruction Manual

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Table 5 Overcurrent protection characteristics of circuit breakers for motors
Rated current In
(A)
Thermal release (ambient tempe40°C) Operating
current of
electromagneti
c release (A)
[Note]
1.0 In non-
operating time
(h) (initial state:
cold state)
1.2 In operating
time (h) (initial
state: thermal
state)
1.5 In operating
time (min) (initial
state: thermal
state)
7.2 In operating
time (s) (initial
state: cold state)
In≤63
>2 ≤2
≤2 2<Tp≤10
(12±2.4)In 63<In≤250 ≤ 4 4<Tp≤10
250<In≤800 ≤8 6<Tp≤20
[Note]: The operating current of the electromagnetic release of HUM8- 630 and 800 (400 A ≤ In ≤ 800
A) is (5±1) In to 14 In.
Adjustable reference value: Low (4 – 6) In; Relatively low (6 – 8.3) In; Relatively high (8.3 – 10.9) In;
High (10.9
–
–14) In.
6 Circuit Breaker Accessories
6.1 List of accessory models (see Table 6).
Table 6 List of accessory models
Shell frame level rated current Inm
(A)
63 100 250 400 630, 800
Internal
accessories
Alarm contact B1 B2 B3 B4
Auxiliary contact F1 F2 F3 F4
Shunt trip FL1 FL2 FL3 FL4
Undervoltage release QY1 QY2 QY3 QY4
Accessory terminal JX
External
accessories
Rotation operating handle CS1-63 CS1-100 CS1-250 CS1-400 CS1-630
Electric operating mechanism MDX0 MDX1 MDX2 MDX3 MDX4
Mechanical interlock
3-pole N1-3 N2-3 N3-3 N4-3 N5-3
4-pole —— N2-4 N3-4 N4-4 N5-4
6.2 Rated values of auxiliary contacts and alarm contacts
Conventional thermal current Ith = 6 A;
Rated working current Ie = 0.79 A (230 V, AC); Ie = 0.47 A (400 V, AC); Ie = 0.15 A
(220 V, DC).
6.3 Shunt trip parameters
Rated voltage Us: AC: 110 V, 230 V, 400 V; input capacity: 180 VA;
DC: 24 V, 48 V, 110 V; input capacity: 60 W.
The circuit breaker can interrupt reliably under (70%–110%) Us, and the operating
time is 10 ms–30 ms.
When the rated control power supply voltage of the shunt trip is DC 24 V, the maximum
length of the copper conductor shall meet the requirements of Table 7.
Table 7 Maximum Length of the copper conductor
Conductor
Rated control
area power supply
voltage Uc (DC 24 V)
1.5mm 2 2.5mm 2
100% Uc 150m 250m
80% Uc 100m 160m
If the requirements of the above table are not met, it is recommended to
design the control circuit of the shunt trip according to Figure 1.
Inside the dotted line
box is the schematic
diagram of the shunt
trip
Power supply input
The voltage of the input terminal of the power
supply is: AC 50 Hz 230 V, 400 V
KA: DC 24 V. The current capacity of the
intermediate relay contact is 1 A.