Huanyu HUM8L Series Owner's manual

- 1 -
HUM8L/HUM8LY
Series Earth Leakage 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/T 14048.2, and therefore is allowed to
leave the factory.
Inspector:
Date of inspection: See the product or
packaging.
HUANYU HIGH-TECH CO., LTD.
Inspection
09

1 Overview
The HUM8L Series Earth Leakage Circuit Breaker (hereinafter referred to as “circuit breaker”) is a new
product successfully developed by our company with international advanced technology in 1990s. This
product is characterized by perfect protection, reliable performance, high technical specification,
beautiful appearance and small size, which is an ideal product for upgrading old products.
Users must carefully read this instruction before installation, use and maintenance to ensure correct
use and avoid safety accidents.
2 Purpose and Scope of Application
This circuit breaker is suitable for the power system with AC 50 Hz, rated voltage of 400 V, and rated
current up to 630 A. It is used to distribute electric energy, protect the power system from overload,
short circuit and other faults, and control the infrequent operation of the motor.
The earth leakage (residual current) protection function of the circuit breaker is to provide indirect
contact protection for personal electric shock with fatal danger, and also to prevent electrical fire
caused by long-standing grounding fault current that cannot be detected by the overcurrent protection
device.
When the rated residual operating current is set to 30 mA (for the non-delay circuit breaker) and the
relevant protection device fails, the circuit breaker can also be used as a direct contact protection
device.
However, the circuit breaker cannot protect against the electric shock caused by the simultaneous contact
with two load conductors (two phase wires or any phase wire and neutral wire).
The rated value of the residual operating current of the circuit breaker as well as the operating time of
the HUM8LY earth leakage protection can be adjusted. Therefore, selective protection during earth
leakage can be realized in the power distribution system.
Classification by DC component: Type AC, ensuring the tripped CBR for the sinusoidal residual current
without DC component whether suddenly applied or slowly raised. Type AC, ensuring the tripped CBR
for the sinusoidal residual AC current with specified pulsating DC residual current whether suddenly
applied or slowly raised.
3 Standards Followed
The circuit breaker complies with the following standards:
IEC 60947-2, GB/T 14048.2 Low-voltage Switchgear and Controlgear — Part 2: Circuit-breakers;
IEC 755, GB/Z 6829-2008 General Requirements for Residual Current Operated Protective Devices.
4 Normal Working Conditions
4.1 The circuit breaker is suitable for the following working conditions:
4.1.1 The ambient air temperature shall not be higher than +40°C or lower than -5°C.
4.1.2 The altitude of the installation location shall not exceed 2,000 m.
4.1.3 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 temperature of the wettest
month shall not exceed +25°C, and the average maximum relative humidity of that month shall
not exceed 90%.
4.1.4 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.
4.1.5 The installation category is Grade III.
4.1.6 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.
4.1.7 The intensity of external field at the installation site shall not exceed 5 times of the geomagnetic
field.
4.1.8 The installation location shall be free of significant vibration and impact (with the acceleration
not more than 5 g).
4.1.9 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.
4.2 The three-phase load of the 3-pole circuit breaker must not have the neutral wire to avoid
malfunction.
4.3 Testing device
When the main circuit is energized, for non-delay circuit breakers, after the test button of the circuit
breaker is pressed, the circuit breaker shall trip within 0.1 s. For delay circuit breakers, the circuit
breaker will not trip until the test button is pressed and the set delay value must be maintained.
4.4 The earth leakage circuit breaker cannot be used in parallel with another one, nor can it be used
in parallel with other switchgears.

5 Model Description
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,
code C for plug-
in connection, and
code
CH for pull-out connection (only for 3 poles)
Application code: No code for power distribution; Code 2 for motor
protecti
on
Internal accessory code (see Table 3)
Overcurrent release type (see Table 2)
Type of neutral pole (N pole) of 4
-pole circuit breaker (see Table 1)
Number of poles of circuit breaker: 3 for 3 poles; 4 for 4 poles
Circuit breaker rated current In (A) (see Table 4)
Operation mode: No code for handle direct operation;
Code M for electrical operation;
Code Z for handle rotation operation
Short
-circuit breaking capacity level: S — Standard type;
H
— Advanced type; U — Current limiting type
Shell frame level rated current (A) (see Table 4)
No code for the non
-delay type; Code Y for the delay type;
Code B for alarm without tripping
Only earth leakage (residual current) protection function is available
Design number
Molded
Case Circuit Breaker
Enterprise code
Table 1
Code
Type
Description
A Type A
The N pole is not equipped with an overcurrent release and is normally on,
and is not closed/opened with the other three poles.
B Type B
The N pole is not equipped with an overcurrent release, and is
closed/opened with the other three poles.
Table 2
Code
Type
Description
1 Delay release
With the overcurrent inverse time limit protection
characteristic
2
Instantaneous
release
i.e. electromagnetic release
3
Complex release
With the above two functions
Table 3
Inm
(A)
I
II
III
Notes
Code
Description
Code
Description
Code
Description
100
250
0
N/A
0~1
Number of
auxiliary
contacts
0~1
Number of
alarm contacts
1
Shunt trip
400
0
N/A
0~3
0~2
II+III≤5
1
Shunt trip
0~1
0~1
II+III≤2
2
Undervoltage
release
0~1 0~1 II+III≤2
630
0
N/A
0~4
0~3
II+III≤7
1
Shunt trip
0~2
0~2
II+III≤4
2
Undervoltage
release
0~2 0~2 II+III≤4

6 Main Technical Performance Indicators
6.1 See Table 4 for basic specifications and parameters of the circuit breaker.
6.2 See Table 5 and Table 6 for the operating time of earth leakage protection.
6.3 Working reliability in the case of power voltage failure
6.3.1 When the three-phase power supply is disconnected from any phase at 0.85 Ue and the
residual current IΔ = IΔn, the circuit breaker can still be reliably interrupted.
6.3.2 After the voltage of phase wire to neutral wire of the three-phase power supply drops to
50 V, when residual current IΔ = IΔn, the circuit breaker can still be reliably interrupted.
Table 4
Shell frame level rated
current Inm (A)
100(125) 250 400 630
Product model
HUM8L-100S
HUM8L-125S
HUM8L-100H
HUM8L-125H
HUM8L-100U
HUM8L-125U
HUM8L-250S HUM8L-250H HUM8L-250U HUM8L-400S HUM8L-400H HUM8L-400U HUM8L-630S HUM8L-630H HUM8L-630U
Rated current
In (A)
10, 16, 20, 25, 32, 40, 50,
63, 80, 100, (125)
100, 125, 150, 160, 175, 200,
225, 250
250, 300, 350, 400 400, 500, 630
Number of poles
3
4
3
4
3
3
4
3
4
3
3
4
3
3
3
4
3
3
Rated insulation voltage
Ui (V)
AC 800 50Hz
Rated working voltage
Ue (V)
AC 400 50Hz
Rated impact withstand
voltage
Uimp (kV)
8
Flashover distance
(mm)
≤ 50 (0 ) * ≤ 50 (0) * ≤ 100 (0 ) * ≤ 100 (0) *
Rated ultimate/operating
short-circuit breaking
capacity Ics (kA)
50/35 85/65 125/125 50/35 85/65 125/125 70/70 100A00 125/125 70/70 100/100 125/125
Rated
residual
operating
current IΔn
(mA)
Non-delay
type
30 mA (non-delay type only) /50 mA/100 mA/300 mA/500 mA (500, 800, 1,000, three gears adjustable) * *
Delay type
Rated residual non-
operating current IΔno
(mA)
Rated residual short-
circuit switching capacity
IΔm (kA)
Operation
performance
(times)
Energizing
1,500
1,000
500
500
De-
energizing
8,500 7,000 4,000 2,500
Outline dimensions
(mm)
a 90
120 90 120 90 105 140 105 140 1105 140 185 140 210 280 210
b 155 216 165 240 257 297 275 322
c 68 68 103 200 103 200
Installation
dimensions (mm)
A 30 35 44 70
B 132 193 126 201 194 234 243 290
Φ5 5 7 7

Table 5 Operating time of non-delay residual current protection (t)
Table 6 Operating time of delay residual current protection (t)
Tn in the table is the delay setting value.
7 Overcurrent Protection Characteristics
7.1 See Table 7 for the overcurrent protection characteristics of circuit breakers for
power distribution.
7.2 See Table 8 for the overcurrent protection characteristics of circuit breakers for
motor protection.
8 Circuit Breaker Accessories
8.1 See Table 9 for the list of accessory models.
8.2 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
(220 V, DC).
8.3 Shunt trip parameters
Rated voltage Us: AC: 110 V, 230 V, 400 V;
DC: 24 V, 48 V, 110 V.
The circuit breaker can interrupt reliably under (70% ~ 110%) Us, and the
operating time is 10 ms ~ 30 ms.
Table 7 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)
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
50, 100, 300, 500, 800, 1,000
—
—
—
—
,

Table 8 Overcurrent protection characteristics of circuit breakers for the
motor protection
Rated
current In
(A)
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 Tp (s)
(initial state:
cold state)
Operating
current of
electromag
netic
release (A)
In≤63
>2 ≤2
≤2
2<Tp≤10
(12±2.4) In
63<In≤250
≤4
4<Tp≤10
250<In≤400
≤8
6<Tp≤20
Table 9 List of accessory models
Shell frame level rated current
Inm
(A)
100 250 400 630
Internal
accessories
Alarm contact
B2
B3
B4
Auxiliary contact
F2
F3
F4
Shunt trip
LFL
FL4
Undervoltage
release
N/A N/A QY4
Terminal block
JX
External
accessories
Rotation operating
handle
CS1-100 CS1-250 CS1-400 CS1-630
Electric operating
mechanism
MDX1 MDX2 MDX3 MDX4
Earth leakage
alarm module
LB
8.4 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.
8.5 See Table 10 for the parameters of the electric operating mechanism.
Table 10 Main technical parameters of the MDX Electric Operating Mechanism
Shell frame level rated current
Inm
(A)
100 250 400 630
Model of electric operating
mechanism
MDX1 MDX2 MDX3 MDX4
Rated working voltage Ue
(V)
AC 110V~230V, 50Hz; DC 110V~220V
Operating 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 and operating
current is not less than 85% Ue.
Wiring diagram of the MDX Electric Operating Mechanism
8.6 LB earth leakage alarm module
The HUM8LB Earth Leakage Circuit Breaker needs to be plugged with LB earth
leakage alarm module on the right side of the open circuit, and the terminals P1-P2
of this module are externally connected with AC 400 V or AC 230 V power supply.
When earth leakage occurs in the main circuit of the circuit breaker and IΔ ≥ IΔn, the
circuit breaker does not trip, the relay in the alarm module acts, and the terminals S1-
S2 and S3-S4 are internally connected with relay contacts to send out alarm signals.
Wiring diagram of LB earth leakage alarm module:
9 Use and Maintenance
9.1 Considerations before installation of the circuit breaker
The appearance of the circuit breaker is in good condition, and no-load operation
works normally.
The rated values of the circuit breaker and its accessories shall be consistent with
the working conditions of the installation site.
For the circuit breaker is equipped with electronic circuit board, if the insulation test
is carried out, it’s required to
a) Use a 500 V megger;
b) Measure the insulation resistance between terminals 1-2, 3-4 and 5-6 when the
circuit breaker is switched off;
c) And measure the insulation resistance between the terminals of the main circuit
and the shell (covered with metal foil) when the circuit breaker is closed.
d) The measured insulation resistance shall not be less than 1.5 MΩ.
9.2 The cross-section area of the connecting conductor of the main circuit of the
circuit breaker shall not be less than that specified in Table 11, and the
connecting screws shall be tightened.
MDX type
Closed
Open
Contact capacity:

Table 11 Cross-section area of the connecting conductor of the main
circuit
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 S
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
Copper
conductor
Pcs
2
2
Cross-section
area
(mm
2
)
150 185
Copper
busbar
Pcs
2
2
Cross-section
area
(mm2)
30×5 40×5
9.3 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.
9.4 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.
9.5 As required by the user, the rated residual operating current IΔn and earth
leakage operating time shall be set (HUM8L non-delay earth leakage operating
time is not adjustable, while HUM8LY earth leakage operation time is adjustable).
9.6 According to Chapter 4 "Normal Working Conditions" of this instruction and the
above articles of this chapter, the circuit breaker can be closed and put into
operation after completing inspections. During the operation of the circuit breaker,
the testing device shall be operated once a month according to Article 4.3 to
confirm that the earth leakage protection function of the circuit breaker is normal.
9.7 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.

Address: Wenzhou Bridge Industrial
Zone, Yueqing City, Zhejiang
Province
Service hotline: [phone]
Switchboard: 0577-62889999
Fax: [phone]
Website: www.huyu.com.cn
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.