2011.09
BHP Series
Succeeding the world-famous tradition of the Circuit Breaker, the Surge Protective Device (SPD), available
in six rating classes (180, 100, 65, 40, 30, 15kA), launched by Shihlin Electric can be used in a variety of
thunder-striking hazardous areas. It is mainly used for surge protection of electrical power.
With professional specialty in design and manufacturing, the drawable Surge Protective Device developed
by Shihlin Electric not only complies with the international professional standard but also features superior
quality, sophisticated design, excellent function, safety and high reliability. It is easy for installation and
maintenance without disconnecting the power.
SURGE PROTECTIVE DEVICE
Low Voltage System Surge Protective Device
Protect Features
1
2
3
4
5
6
7
8
9
10
11
12
Application: Protect electric system and unloading electrical apparatus from thunder and instantaneous over-voltage
Compliance with IEC standard, and CE Certification
Class II protection for testing 8/20µs waveform, which also can be converted to 10/350µs for Class I protection
Faster response less than 25ns
Standard module-type design. DIN-Rail 35mm mounting
Equip with the visual failure indicator
Automatic trigger for SPD replacement
Each unit is provided with an auxiliary alarm contact set
Counter can be added
Operating temperature: -40℃~ +80℃
It is applicable for AC and DC power system
Dust/ water resistant class: IP20
Terminology
1 Maximum continuous operational voltage – Uc (V): When applying maximum effective value or DC voltage to the SPD,
its normal function will not be degraded or restricted.
2 Protection level – Up (kV): Maximum allowable residual voltage after diverting the surge current – The smaller the
value, the better the surge protection effect.
3 Nominal discharge current – In (kA): When applying 8/20µs waveform, the surge impact to the peak current flowing
through the SPD is over 10 times.
4 Maximum discharge current Imax (kA) – 8/20µs: The higher the value, the better the surge protection effect. The surge
impact is over 1 time.
5 Reaction time (tA): Demonstrates the action sensitivity and the breaking time of the components in the protective
device.
01
SURGE PROTECTIVE DEVICE
Catalogue
Type
Maximum
discharge current
(Imax)
Number of poles
(P)
R: with alarm auxiliary
contact
Blank: without alarm
auxiliary contact
The standard operation voltage
Uc (V) is below table.
PS: Maximum Operation Voltage
Uc (V): 660V
Maximum
discharge current
1P
Standard operation
voltage
1P+1
2P (1P+N)
BHP
3P
3P+1
4P (3P+N)
To enable the surge protective device to work, please understand the following specification:
1. The grounding system type of the protected device and the maximum operating voltage of the power grid Us.max
2. The impulse withstand voltage of the protected device.
•Common mode
protection:
Earth wire protection
by each wire (earth wire
protection by phase wire
and neutral wire).
Grounding
system
Before RCD After RCD
SPD
•Differential mode
protection:
Protection of earth wire
and neutral wire by
each wire (neutral wire
protection by phase wire
and earth wire protection
by neutral wire).
Neutral point
non-earthing
Neutral point
non-earthing
Common
Differential
Common
Differential
Common
Differential
Common
Differential
Common
Differential
Normal working conditions
•Frequency: the AC power frequency shall be 48~50Hz.
•Voltage: the voltage continuously supplied between the wiring terminals of the surge protective device shall not exceed
its maximum continuous operating voltage Uc.
•Elevation: less than 2,000m.
•Use and storage temperature: - Normal range: -5℃~ +40℃;
- Ultimate range: -40℃~ +80℃;
•Humidity–relative humidity: 30%~ 90% under ambient temperature.
02
The internal core of SPD is one zinc-oxide pressure-sensitive element and zinc oxide consists of grains. When the surge current with energy through
the SPD far exceeds its specified value, ceramic breakdown will happen, and certain grain boundary layers in the ceramic will be damaged. Under
extreme circumstances, excessive heat generated by over high continuous load will damage the grains, and even break the grains down under
serious conditions, leading to the fusion of ZnO grains and thus causing short circuit. Since there is no time for the burst heat to transfer to the
thermal cutoff mechanism, fuse or circuit breaker must be used for cutting off the power.
Even under the condition of precise parameter selection, the over high temperature rise and burst of the SPD due to overload are not eliminated.
MCB
SPD
Max. discharge current Imax
Rated current
Trip characteristic
Model
SURGE PROTECTIVE DEVICE
Combination selection of surge protective device and circuit breaker
Special notes: 1. The X in the breaker model indicates the pole number, for example, to design a breaker for BHP40, in combination with 4-pole 25A breaker,
the model shall be BHA24 C25.
2. The breaking capacity of the breaker must be larger than the maximum short circuit current at this position.
3. Protection shall be provided for each pole of the surge protective device.
4. For PT secondary line protection, due to the restriction of the maximum load current of PT, full consideration shall be given to the following
circumstances:
(1) The maximum short circuit current of PT, it is noted that, when discharge with excessive energy gets SPD breakdown and short-circuit,
the secondary line shall not have high voltage paralysis. At this moment, the release current and quick response capacity of the breaker
must be considered.
(2) Fuse may be considered, since standard fuse cannot be broken down by the pulse current, by contrast, the breaker can protect from the
damages caused by the continuous surge with follow current or energy.
Plug-In type specification
In (kA)
Model
Imax (kA)
Connection
40
1P
1.7
20
15
1.0
10
In (kA)
Model
Imax (kA)
Connection
40
1.7
20
15
1.0
1P+1
10
03
SURGE PROTECTIVE DEVICE
In (kA)
Model
Imax (kA)
Connection
Imax (kA)
Connection
Imax (kA)
Connection
Imax (kA)
Connection
40
1.7
20
15
2P (1P+N)
1.0
10
In (kA)
Model
40
1.7
20
15
1.0
10
3P
In (kA)
Model
40
1.7
20
15
1.0
3P+1
10
Gap discharge
In (kA)
Model
40
1.7
20
15
1.0
4P (3P+N)
04
10
Model
In (kA)
Imax (kA)
Connection
SURGE PROTECTIVE DEVICE
Fixed type specification
Dimension
Installation method of SPD
1. The cable for connecting SPD shall be as short as possible, since
the impedance of the wire can weaken the protection function
of SPD.
2. To realize effective protection, it is suggested to install one leadin device to locally divide the current at the inlet of the device.
3. When one switch device and one SPD are mounted in a serial
manner, the wire shall be as short as possible.
Overlong grounding cable
Short grounding cable
The plug-in module of BHP series plug-in surge protective
device, there is unique pilot hole at the bottom of the base,
cores of different specifications cannot be plugged in if
interchanging positions. The core side is high-grade insulation
material, therefore, when pulling out the core, it will not
contact with charged body.
05
TN-C system three phase
TN-S system three phase
Protection equipment
Protection equipment
SURGE PROTECTIVE DEVICE
SPD wiring example
SPD
SPD
TN-C-S system three phase
First side protection
Second side protection
SPD
SPD
Grounding connection
Grounding connection
IT system three phase
Single-Phase Power Supply Scheme
Protection equipment
Protection equipment
SPD
SPD
Special notes:
Time-delay leakage protector shall be selected for the RCD in the
power supply system; leakage protector insensitive to atmospheric
over-voltage shall be selected for the RCD installed in residences
and office buildings.
06
TT System Scheme 2
Protection equipment
Protection equipment
SPD
SPD
SURGE PROTECTIVE DEVICE
TT System Scheme 1
Special notes:
Time-delay leakage protector shall be selected for the RCD in the power supply system; leakage protector insensitive to atmospheric overvoltage shall be selected for the RCD installed in residences and office buildings.
TN-C
TN-S
IT
Secondary protection
Main panel
Main panel
SPD
Main panel
SPD
Grounding connection
TT System Scheme 1
TT System Scheme 2
Secondary protection
Main panel
Secondary protection
Main panel
SPD
SPD
Grounding connection
Gas dischange device
Counter
Type
Rated working voltage
Counter pulse threshold
1kA
Maximum count
Counting method
Pulse
Count display method
2 digits LED red
Minimum interval between
counter pulses
4P
Counter sensor
3P+1
Gas discharge device
Counter
Sensor
Digital memory method
200ms
Pulse falling edge,
flash accumulation record
Dimension
Lightning strike pulse counter can count the discharge pulses and store
them to the single-chip FLASH, and features intuitive display and small volume.
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SURGE PROTECTIVE DEVICE
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2011.09_e