HUYU HUM8 Series Owner's manual

HUM8 Series
Molded Case Circuit Breaker
Installation and Operation
Instruction
Before installing and using the product, please read the
instruction carefully and well keep it for future reference.
Product Certificate
This product has passed the inspection and meets the
requirements of GB/T14048.2, and therefore is allowed to leave
the factory.
Inspector:
Date of inspection: See the product or packaging.
HUANYU HIGH-TECH CO., LTD.
Inspection
08

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The HUM8 Series Molded Case Circuit Breaker (hereinafter referred to as “circuit
breaker”) is the high-tech product in the 21st century. This product is characterized
by advanced design, reliable performance, high technical indicators, beautiful
appearance, and small size.
1 Purpose and Scope of Application
This circuit breaker is suitable for the power system with AC 50 Hz, rated voltage up
to 690 V, and rated current up to 800 A. It is used to distribute electric energy, protect
circuits and power supply equipment from overload, short circuit, undervoltage and
other faults, and prevent the infrequent operation of the motor.
2 Standards Followed
The product complies with GB/T 14048.2 Low-voltage Switchgear and Controlgear
— Part 2: Circuit-breakers, and IEC 60947-2 Low-voltage Switchgear and
Controlgear — Part 2: Low-voltage Circuit Breakers, etc.
3 Model Description
Overload alarm without tripping is denoted by “I”
Flashover distance: No code with flashover; Code W without flashover
Wiring method:
No code with wiring in front of the plate; Code H with
wiring behind the plate, C for plug-in
connection, and CH
for pull-out connection (only for 3 poles)
No code for conventional products, and Code Y with the special release
with prepaid kilowatt
-hour meter
App
lication code: No code for power distribution; Code 2 for motor protection
Internal acc
essory code (see Table 2)
Overcurrent release type (see Table 1)
Type of neutral pole (N pole) of 4
-pole circuit breaker (note)
Number of poles of circuit breaker: 2 for 2 poles; 3 for 3 poles; 4 for 4 poles
Circuit breaker rated current In (A) (see Table
3)
Operation mode:
No code for handle direct operation;
Code M for electrical operation;
Code Z for handle rotation operation
Short
-circuit breaking capacity level: C — Basic type; S — Standard type;
H
— Advanced type; U — Current limiting type
Shell frame level rated current Inm (A) (see Table 3)
Design number
Molded
Case Circuit Breaker
Enterprise code
Note: In 4-pole products, two types are provided for the neutral pole (N pole):
Type A: The N pole is not equipped with an overcurrent release and is normally on,
and is not opened/closed with the other three poles.
Type B: The N pole is not equipped with an overcurrent release, and is closed/opened
with the other three poles.
Table 1 Type of the overcurrent release
Serial
number
Name Description
1
Delay release
With the overcurrent inverse time limit protection characteristic
2
Instantaneous
release
i.e. electromagnetic release, with the overcurrent instantaneous
operation protection characteristic
3
Complex release
With the above two functions

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Table 2 Internal accessory code
Imm
(A)
I
II
III
Notes
Code
Description
Code
Description
Code
Description
63
100
250
0
N/A
0-2
Number of
auxiliary
contacts
0–2
Number of
alarm
contacts
1
Shunt trip
0–1
0–1
2
Undervoltage
release
0–1 0–1
400
0
N/A
0–5
0—2
II+III≤7
1
Shunt trip
0-3
0–2
II+III≤5
2
Undervoltage
release 0-3 0–2 II+III≤5
3 Shunt/Undervolta
ge release 0–1 0–1 II+III≤2
630
800
0
N/A
0–8
0–3
II+III≤11
1
Shunt trip
0-6
0–3
II+III≤8
2 Undervoltage
release
0–6 0-3 II+III≤8
3 Shunt/Undervolta
ge release
0–3 0–2 II+III≤5
4 Normal Working Conditions
The circuit breaker is suitable for the following working conditions:
4.1 The ambient air temperature shall not be higher than +40°C or lower than -5°C.
4.2 Altitude ≤ 2,000 m.
4.3 The relative air humidity shall not exceed 50% at the maximum temperature of
+40°C. A higher relative humidity is allowed at a lower temperature. The average
minimum temperature of the wettest month shall not exceed +25°C, and the
average maximum relative humidity of that month shall not exceed 90%.
4.4 Contamination grade: Grade 3. There is no explosion danger and no gas or
conductive dust that corrodes metals or damages insulation in the surrounding
air.
4.5 The installation category is Grade III.
4.6 The "1, 3, 5 and N1" terminals of the circuit breaker are connected to the power
supply, and the "2, 4, 6 and N2" terminals are connected to the load, which
cannot be reversed.
4.7 The installation surface of the circuit breaker shall be vertical to the horizontal
plane. The circuit breaker is basically installed vertically, with the power supply
terminal at the top and the load terminal at the bottom, and can also be installed
horizontally.

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5 Main Technical Performance Indicators
5.1 The main technical performance indicators are shown in Table 3.
Table 3 Main technical performance indicators
Shell frame level rated
current Inm
(A)
63 100 (125) 250
Product model
HUM8
-
63S
HUM8-
100C
HUM8-
125C
HUM8-100S
HUM8-125S
HUM8-100H
HUM8-125H
HUM8-100U
HUM8-125U
HUM8-
250C
HUM8-
250S
HUM8-
250H
HUM8-
250U
Rated current In (A)
10,16,20
25,32,40
50,63
10,16,20,25,32,40,50,63,75,100 (125) 100,125,150,175,200,225,250
Number of poles 3 3 4 2 3 4 3 4 3 3 4 3 4 3 4 3
Rated insulation voltage Ui
(V)
AC 800 AC 1,000 AC 1,000
Flashover distance
(mm) ≤50(0)* ≤50 (0)* ≤50 (0)*
Rated
ultimate/
service short
-
circuit
breaking
capacity Ics
(kA)
690V
-
-
5/3
10/5
10/5
-
5/3
10/5
10/5
400V
30/22
30/15
50/35
85/65
125/125
30/15
50/35
85/65
125/125
230V 50/38 50/25 100/50 125/125 200/200 50/25 100/50 125/125 200/200
Operation
performance
(times)
Energizing
8,000
8,000
8,000
De-energizing
20,000
20,000
20,000
Outline
dimensions (mm)
a 75 9
0
120
60
90 120 90 120 90 105 140 105 140 105 140 105
b 130 155 216 165 240
c 68 68 68
Installation
dimensions (mm)
A 25 30(2-pole: 0) 35
B 111 132 193 126 201
Φ5 5 5
* The flashover distance, if zero, shall be indicated when ordering.

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Table 3 Main technical performance indicators (completed)
Shell frame level rated
current Inm (A) 400 630 800
Product model HUM8-
400C
HUM8-
400S
HUM8-
400H
HUM8-
400U
HUM8-
630C
HUM8-
630S
HUH8-
630H
HUM8-
630U
HUM8-
800C
HUM8-
800S
HUM8-
800H
HUH8-
800U
Rated current In
(A)
250,300,315,350,400 400,500,630 630,700,800
Number of poles
3
4
3
4
3
3
3
4
3
4
3
3
3
4
3
4
3
3
Rated insulation voltage
Ui
(V)
AC 1,000 AC 1,000 AC 1,000
Flashover distance
(mm)
≤100 (0)* ≤100 (0)* ≤100 (0)*
Rated
ultimate/
service short
-
circuit
breaking
capacity Ics
(kA)
690V
10/10
10/10
15/10
35/35
10/10
15/15
20/15
35/35
10/10
15/15
20/15
35/35
400V
45/45
70/70
100/100
125/125
45/45
70/70
100/100
125/125
45/45
70/70
100/100
125/125
230V 85/85 100/100 150/100 200/200 85/85 100/100 150/100 200/200 85/85 100/100 150/100 200/200
Operation
performance
(times)
Energizing 7500 7500 7500
De-
energizing
10000 10000 10000
Outline dimensions
(mm)
a 140 185 140 185 140 140 210 280 210 280 210 210 210 280 210 280 210 210
b 257 297 275 322 275 322
c 103 200 103 200 103 200
Installation
dimensions (mm)
A 44 70 70
B 194 234 243 290 243 290
Φ7 7 7
* The flashover distance, if zero, shall be indicated when ordering.
5.2 See Table 4 (for power distribution) and Table 5 (for motor) for the overcurrent
protection characteristics.
Table 4 Overcurrent protection characteristics of circuit breakers for the
power distribution
Rated current In
(A)
Thermal release (ambient temperature +40°C)
Operating current of
electromagnetic
release
(A) [Note]
1.05 In non-operating time
(h) (initial state: cold state)
1.30 In operating time
(h) (initial state: thermal state)
≤63
>1
≤1
(10±2)In
>63
>2
≤2

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Table 5 Overcurrent protection characteristics of circuit breakers for motors
Rated current In
(A)
Thermal release (ambient temperature +40°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)
1.5mm22.5mm2
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.

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6.4 Parameters of the undervoltage release
Rated voltage Ue: AC: 110 V, 230 V, 400 V; DC: 24 V, 48 V, 110 V.
The circuit breaker can interrupt reliably under (35%–70%) Us, and the operating time
is 10 ms–30 ms. When the power supply voltage is less than 35% Ue, the circuit
breaker can be prevented from closing. When the power supply voltage is more than
or equal to 85% Ue, the circuit breaker can be reliably closed.
6.5 See Table 8 for the parameters of the electric operating mechanism.
Table 8 Main technical parameters of the MDX Electric Operating Mechanism
Shell frame level rated current Inm (A)
63
100
250
400
630, 800
Model of electric operating mechanism
MDX0
MDX1
MDX2
MDX3
MDX4
Rated working voltage Ue (V)
AC 110V–230V, 50Hz; DC 110V–220V
Starting current (A)
≤0.5
≤2
Operating time (s)
≤0.8
Rated operating frequency (times/h))
180
120
Mechanical life (times)
15,000
9,000
5,000
3,000
The power supply capacity of the electric operating mechanism shall be large enough to ensure that the
voltage applied to the electric operating mechanism under the starting current is not less than 85% Ue.
See Figure 2 for the wiring diagram of the electric operating mechanism.
Figure 2 Wiring diagram of the MDX Electric Operating Mechanism
6.6 Special release with prepaid kilowatt-hour meter
The rated working voltage Ue of the special release with prepaid kilowatt-hour meter
is AC 240 V/50 Hz. It can work normally in the range of (65%–110%) Ue. When the
Ctrl terminal is cut off, the breaker will delay opening by 0.5 s–2 s. See Figure 3 for
the wiring diagram.
6.7 Parameters of the overvoltage release (applicable to 4-pole circuit breaker):
Rated working phase voltage Ue: AC 230 V 50 Hz (or 60 Hz).
Release operation characteristics: When the main circuit phase voltage is (85%–
110%) Ue, the release shall be able to keep the circuit breaker working for a long
time. When the phase voltage of the main circuit rises to 270 (1±5%) V, the release
combined with the circuit breaker shall operate to open the circuit breaker. See Figure
4 for the wiring diagram.
Figure 4 Wiring diagram of the overvoltage release
MDX
type
Closed
Open
Release
Circuit breaker
L1
-N
Rated working voltage Ue of
Ctrl
-N: AC 240 V/50 Hz
Note: N is connected to
the power neutral wire,
and Ctrl is connected to
the control signal terminal
of the prepaid kilowatt
-
hour meter.
Release
P1, P2, UC1 and UC2 on the
release
must correspond to 2, 4, 6
and N on the load side of the access
circuit breaker.

Address: Wenzhou Bridge Industrial
Zone, Yueqing City, Zhejiang
Province
Service hotline: [phone]
Switchboard: 0577-62889999
Fax: [phone]
Website: www.huyu.com.cn
7 Use and Maintenance
7.1 Considerations before installation of the circuit breaker
The appearance of the circuit breaker is in good condition, and no-load operation
works normally.
The insulation resistance between the poles of the circuit breaker and the incoming and
outgoing line terminals of the same pole in the interrupting state shall not be less than 1.5
MΩ.
The rated values of the circuit breaker and its accessories shall be consistent with
the working conditions of the installation site.
There shall be no significant impact vibration at the installation, which meets the
normal working conditions.
7.2 The cross-section area of the connecting conductor of the circuit breaker shall not be
less than that specified in Table 9, and the connecting screws shall be tightened.
Table 9 Cross-section area of the connecting conductor
Rated current In (A)
10
16
20
32
40
50
63
75
100
125
150
175
200
225
250
300
350
400
Cross-section area of
conductor (mm
2
)
1.5
2.5
6
10
16
25
35
50
70
95
120
185
240
Rated current In (A)
500
630
700, 800
Copper conductor
Pcs
2
2
2
Cross-section area (mm2)
150
185
240
Copper busbar
Pcs
2
2
2
Cross-section area (mm2)
30×5
40×5
50×5
7.3 Various characteristics of the circuit breaker and its accessories are set by our
company according to the order requirements, and cannot be adjusted freely
during use.
7.4 The handle of the circuit breaker can be in three positions: "Closed", "Open" and
"Tripped". When the handle is in the trip position, it shall be pulled in the "Open"
direction to make the circuit breaker trip again, and then the "Closing" operation
can be carried out.
7.5 For installing the internal accessories, the circuit breaker must be tripped and
interrupted before installation.
Company Commitment
On the premise that users abide by the use and storage conditions and that the
product seals are intact, if the product is damaged or cannot be used normally due to
manufacturing quality problems within 18 months from the production date of the
product, our company will be responsible for the repairing or replacement free of
charge. If the warranty period expires, users shall pay for the repair. However, if the
damage is caused by the following circumstances, the fees for repair still shall be
charged even within the warranty period:
(1) Misuse, self-modification, improper maintenance, etc.
(2) Use beyond the standard specification requirements.
(3) Falling, damage during transportation, etc. after purchase.
(4) Earthquake, fire, lightning strike, abnormal voltage, other natural disasters and
secondary disasters, etc.
In case of any questions, please contact the dealer or our customer service department.
Dear customers:
To protect our environment, please recycle the product or its components when the
product is scrapped. For materials that cannot be recycled, please handle them
properly. Thank you very much for your cooperation and support.