Huanyu HYT3P Series Owner's manual

HYT3P Series
PC-level Automatic Transfer
Switching Equipment
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/T14048.11, and
therefore is allowed to leave the factory.
Inspector:
Date of inspection: See the product or
packaging.
HUANYU HIGH-TECH CO., LTD.
Inspection
07

- 1 -
Considerations in Use
Dear users:
To use this product correctly and reasonably and avoid unnecessary losses, please read this
instruction carefully before installation, use, circuit connection, operation and maintenance
inspection. This instruction introduces the structure, working principle, use conditions,
installation, commissioning, etc. of the automatic transfer switching device (hereinafter referred
to as the “transfer switch”), which is conducive to your correct and reasonable use of this product.
If you have any questions, please consult our company. The user shall be responsible for the
adverse consequences caused by not operating according to this instruction.
Attention:
1. Please read this instruction carefully before use, and operate in strict accordance with the
guidelines.
2. Non-professionals are prohibited from maintenance operation, otherwise it will lead to
electric shock or product damage.
3. Before energizing or configuring the product, check whether the specification of the
transfer switch meets the use requirements, and use appropriate voltage measuring
equipment to determine the voltage condition.
4. Measure the insulation resistance of the main circuit with a 500 V megger before use (the
secondary circuit must be disconnected during measurement, otherwise the intelligent
controller will be damaged), and the resistance shall not be less than 1.5 MΩ at the
ambient temperature of 20°C ± 5°C and the relative humidity of 50% ~ 70%. Otherwise,
the transfer switch shall be dried until the insulation resistance meets the specified
requirements.
5. This product has been tested for the dielectric performance according to the standard
before leaving the factory. If the retest is carried out, the controller must be removed to
avoid damage to the product.
6. Wiring must be carried out according to the phase sequence identification of the incoming
terminal of the transfer switch body, the phase sequence of the incoming terminals of the
two power supplies must be consistent, and the neutral wire must not be mistakenly
connected to the phase wire.
7. 4-pole and 2-pole transfer switches connect the neutral wires of two power supplies to the
corresponding incoming terminals of "common power supply" and "standby power supply"
respectively. 3-pole switching devices must have the neutral wires of two power supplies
connected to the corresponding auxiliary terminals. Do not share the neutral wires, and
the wiring shall be reliable, otherwise the transfer switch will not work normally.
8. The shell of the transfer switch must be reliably grounded to ensure the safety of operators.
9. Do not install the transfer switch outdoors in damp, direct sunlight, high temperature, large
vibration impact and conductive dust, otherwise the service life of the product will be
shortened or adverse reactions will be caused.
10. When the transfer switch is in the automatic transfer state, do not use the handle for
transfer operation, otherwise the control circuit will be partially damaged.
11. In the cases of the failure of common power supply and standby power supply, manual
closing is prohibited.
12. To ensure the reliability of the transfer switch, it is required to conduct the switching test
regularly to confirm that the switch works normally and ensure the continuity of power
supply for important loads.
13. Before the normal maintenance and troubleshooting of the system circuit, all power
supplies must be turned off, the switching device shall be switched to the "0" position, and
then the "No Closing" sign shall be placed in the prominent position for maintenance, so
as to avoid unnecessary property loss and personal injury.
14. When the transfer switch is in maintenance or regular inspection, please commission it in
the "Manual" mode.
15. Products that are not used for a long time shall be moisture-proof and dust-proof, and
must be commissioned according to the specified contents before use to ensure that the
transfer switch can work normally before being put into operation.

- 2 -
1 Scope of Application
This transfer switch is suitable for the dual-power supply system with AC 50 Hz, rated working
voltage of 230 V (Level 2), 400 V (Level 3, 4) or below and rated current of 16 A to 630 A. It can
simultaneously detect the two power supplies of the power supply system: the common power
supply (N) and the standby power supply (R), and automatically (or manually) switch from the
abnormal power supply to the normal power supply when the power supply is in undervoltage
and phase failure, so as to improve the continuity, safety and reliability of the power supply
system in the place of use.
This transfer switch is widely used in power systems, hospitals, posts and telecommunications,
fire control, hotels, banks, airports, docks, residential quarters, television stations, military
facilities, shopping malls and other important places with high requirements for power supply
continuity.
2 Standard Followed
The switching device complies with GB/T 14048.11 Low-voltage Switchgear and Controlgear —
Part 6-1: Multiple Function Equipment — Transfer Switching Equipment, which is equivalent to
IEC 60947-6-1.
3 Model Description
4 Normal Working Conditions
4.1 The ambient air temperature shall be -5°C ~ +40°C. The average temperature within 24
hours shall not exceed +35°C.
4.2 The altitude of the installation location shall not exceed 2,000 m.
4.3 The relative air humidity at the installation site shall not exceed 50% when the ambient air
temperature is +40°C. A higher relative humidity is allowed at a lower temperature. For
example, when the average minimum temperature in the wettest month is +20°C, the
monthly average maximum relative humidity of that month can reach 90%. Appropriate
measures shall be taken to prevent condensation caused by temperature change.
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 Two power lines are connected to the upper terminal of the switching device, and the
load line is connected to the lower terminal, which cannot be reversed.
4.7 The installation location shall be free of significant vibration and impact.
Optional function code: W — Fire control linkage feedback function
(optional for the standard type only, not for the economical type)
None: Power grid — Power grid;
F: Power grid — Generator (optional for the standard type only)
Controller code: A — Economical type; B — Standard type
Number of poles: 2: 2 poles; 3: 3 poles; 4: 4 poles
Shell frame level rated current: 125; 250; 630
Product electrical appliance level: PG
Design number
Product code: Automatic Transfer Switching Equipment
Enterprise code: HUANYU HIGH-TECH CO., LTD.

- 3 -
5 Main Technical Parameters
Table 1
Model &
specification
Technical
parameter
HYT3P-125 HYT3P-250 HYT3P-630
Rated working current Ie
16A, 20A, 25A,
32A, 40A, 50A,
63A, 80A, 100A,
125A
125A, 140A, 160A,
180A, 200A, 225A,
V250A
250A, 315A, 350A,
400A, 500A, 630A
Rated working voltage Ue
AC 230 V/50 Hz (Level 2), AC 400 V/50
Hz AC 415V/50Hz
Rated insulation voltage
Ui 800 V
Rated impact withstand
voltage Uimp 8 kV 12 kV
Rated short-circuit making
capacity Icm 17 kA 52.5 kA
Rated short-time
withstand current Icw 10 kA/30 ms 25 kA/1 s
Mechanical life 10,000 8,000 4,000
Electrical life 1,500 1,200 1,000
Use category AC-33B
Electrical appliance level PC
Contact transfer time 0.6s±20%
Transfer operating time 1.3s±10%
Return transfer time 1.3s±10%
Power off time 0.6s±20%
Electromagnetic
compatibility environment
Environment B
Contamination grade 3
Number of poles 2P, 3P, 4P 3P, 4P
IP level IP20
Installation mode Vertical fixed installation
Wiring method Screw wiring
Operation mode Automatic/Manual
Screw tightening torque
(N∙m) 3.5N·m 8N·m 12N·m
Switch position Common position (I), standby position (II) and disconnection
position (0)
Rated control power
supply voltage Us AC 230V/50Hz
Voltage deviation range of
power supply Undervoltage transfer: 160 V±10%
Control characteristic Voltage loss, undervoltage and phase failure transfer

- 4 -
6 Schematic Diagram of Product Structure
Figure 1
6.1 Product structure description
1 — Bottom plate; 2 — Standby input terminal; 3 — Common input terminal;
4 — Transfer location indication; 5 — Handle; 6 — Automatic/Manual transfer switch;
7 — Sign; 8 — Grounding screw; 9 — Indicator light;
10 — Secondary control line terminal; 11 — Output terminal.
6.2 Controller panel and description
Figure 2
Table 2
Product Status 1 2 3 4
Common power supply normal Normally on
Common power supply closed Normally on
Standby power supply normal Normally on
Standby power supply closed Normally on
Common Standby Standby Common
Power
supply
Closing

- 5 -
7 Controller Function
Table 3
Controller type Type A (economical type) Type B (standard type)
Control functions
Automatic/Manual transfer
mode ■ ■
Dual-split ■ ■
Power grid — Power grid ■ ■
Power grid — Generator - □
Automatic charge and
automatic recovery ■ ■
Monitoring common power
supply and fault conversion
■ Phase failure/voltage loss, undervoltage
Monitoring standby power
supply and fault conversion
■ Phase failure/voltage loss, undervoltage
Fire control input (DC 24 V) - ■
Fire control feedback output - □
Indications
Common and standby
closing indication ■ ■
Common and standby power
supply indication ■ ■
Fault alarm ■ ■
Transfer functions
Undervoltage transfer ■ ■
Voltage loss transfer ■ ■
Other functions
Communication function - -
Display module LED LED
Note: "■" indicates that this function is available. "-" indicates that this function is not available.
"□" indicates that this function is optional.

- 6 -
8 Product Installation
8.1 Outline and installation dimension diagram
Figure 3
Table 4
Model W W1 L L1 H X P
HYT3P-125/4 284 269
136 100 104 7 30 HYT3P-125/3 254 239
HYT3P-125/2 224 209
HYT3P-250/4 387 368
170 125 129 8 45.5 HYT3P-250/3 341 323
HYT3P-250/2 295 276
HYT3P-630/4 595 567 255
187 194 13 68. 2
HYT3P-630/3 527 499
8.2 4P product main circuit wiring
Figure 4
8.2.1 Wiring instruction
1. NA, NB, NC and NN are common inputs A, B, C and N.
2. RA, RB, RC and RN are standby inputs A, B, C and N.
3. L1, L2, L3 and N are output terminals A, B, C and N.

- 7 -
8.3 3P product main circuit wiring
Figure 5
8.3.1 Wiring instruction
1. NA, NB and NC are common inputs A, B and C.
2. RA, RB and RC are standby inputs A, B and C.
3. L1, L2 and L3 are output terminals A, B and C.
4. 201 is the common power supply neutral wire.
5. 301 is the standby power supply neutral wire.
8.4 2P product main circuit wiring
Figure 6
8.4.1 Wiring instruction
1. NA and NN are common inputs A and N.
2. RA and RN are standby inputs A and N.
Controller
secondary wiring
Common power supply
neutral wire
Standby power supply
neutral wire

- 8 -
8.5 Controller secondary terminal wiring
Figure 7
8.5.1 Wiring of the secondary terminal of the controller
1. 203#, 201#: Common power supply closing external indicating signal output terminal (AC
220 V/0.5 A, active). The common neutral wire of the 3P product is connected to 201#
terminal.
2. 202#, 201#: Common power supply external indicating signal output terminal (AC 220
V/0.5 A, active).
3. 303#, 301#: Standby power supply closing external indicating signal output terminal (AC
220 V/0.5 A, active). The common neutral wire of the 3P product is connected to 301#
terminal.
4. 302#, 301#: Standby power supply external indicating signal output terminal (AC 220 V/0.5
A, active).
5. 603#, 602#, 601#: Passive output terminals of generator starting control signals, where
601# is the common terminal, 602# is the normally closed terminal, and 603# is the
normally open terminal. When the common power supply is normal, 601# and 603# are
closed, and 602# and 601# are disconnected. When the common power supply is
abnormal, 602# and 601# are closed, and 601# and 603# are disconnected.
6. 501#, 502#: Active input terminal of fire control linkage signal. When this port is externally
connected to the DC 24 V active signals, the controller immediately controls the switch to
transfer to the open position to cut off the load power supply.
7. 503#, 504#: Passive output terminals of fire control feedback signal. Under normal
conditions, this port is normally open, and 503# and 504# are closed when a fire control
signal is input to the controller to transfer the switch to the opening position.
8.6 Handle function description:
Figure 8
Common closing indication
Common power supply
indication
Standby closing indication
Standby power supply indication
Standby power supply neutral wire
Generator starting
Generator control common terminal
Generator shutdown
Fire control feedback output
Fire control feedback
output
Fire control active input
Fire control active input
Handle
Push plate
Product body

- 9 -
1. Manual operation: Push the push plate of the transfer switch to the right for manual
operation, and insert the handle into the body. Then you can manually operate the switch.
2. Remove the handle and push the push plate left to the automatic position (which is the
automatic transfer state) if needed.
8.7 Description of automatic transfer operation flow of the product:
Power grid — Power grid, Automatic
charge and automatic recovery mode
Power grid — Generator, Automatic
charge and automatic recovery
QN: Common side circuit breaker;
QR: Standby side circuit breaker.
9 Use and Maintenance
9.1 Product commissioning
After installation, the product shall be commissioned. Manual commissioning: Adjust the
automatic/manual switching gear of the transfer switch to the manual gear, and then pull the
handle to make the product in the state of common closing, dual-split, and standby closing, and
check whether the product is reliably closed.
Power-on commissioning: Adjust the automatic/manual switching gear of the transfer switch to
the automatic gear first, and then energize the two power supplies. Commission the product
according to the product transfer process in Article 8.7, and observe whether the product
transfer and panel indicator light are normal and whether the output state of the secondary
terminal is correct.
9.2 Product fault analysis and maintenance
Common/standby power
supply normal
Common power
supply abnormal
Common power supply
opening
Transfer to standby
power supply
Common power supply
recovery normal
Standby power supply
closed
Standby power supply
opening
Common power supply
closed
Transfer to common
power supply
Common/standby power
supply normal
Common power supply
abnormal
Common power supply
opening
Standby power supply
closed
Standby power supply
opening
Common power supply
closed
Transfer to standby power
supply
Transfer to common power
supply
Common power
supply recovery
normal
Generator starting signal output
Generator voltage reaching 80% of the
rating
Output the generator stop
signal
Generator
shutdown

- 10 -
Table 5
Fault Cause analysis Troubleshooting method
The indicator light on
the controller panel is
not on after power-on
Loose, falling off or poor contact of power
supply sampling wire Check and connect the
conductors
The 3P product neutral wire is not
connected to the terminal
Phase failure of power supply Check whether the power
supply voltage is normal
10 Ordering Information
10.1 When ordering, please fill in according to Table 6.
Table 6
Order unit Order quantity Order date
Model Number
of poles
Controller
code
Rated working
current
Optional
function code
Notes
□HYT3P-125
□2P
□3P
□4P
□ A
(Economical
type)
□ B (Standard
type)
□16A □20A □25A □32A
□40A □50A □63A □80A
□100A □125A
Type B
controller
optional
□ F
(Power grid -
Generator)
□ W
(Fire control
feedback)
□HYT3P-250
□125A □ 140A □ 160A □ 180A
□200A □ 225A □ 250A
□HYT3P-630
□3P
□4P
□250A □ 315A □ 350A □ 400A
□ 500A □ 630A
Example:
HYT3P-125/4 B F W 125 A indicates a 4-pole automatic transfer switching equipment with
automatic charge and automatic recovery of power grid and generator, and rated working current
of 125 A.
11 Ordering Information
On the premise that users abide by the use and storage conditions and 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 sha 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.

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