40A 4 Pole 30mA Type B 10KA Residual Current RCD Circuit Breaker
What are RCDs?
Residual Current Devices (RCDs) are safety switching devices. They
are designed to provide safety for three types of protection;
- Fault Protection. Any tripping current dependent on the resistance
of the earth path.
- Additional Protection. RCDs not exceeding 30 mA tripping current.
- Fire Protection. A tripping current not exceeding 300 mA.
Specification
| Type(wave form of the earth leakage sensed) | B Type RCCB |
| Rated current In | 63A |
| Poles | 4P |
| Rated voltage Ue | 2P 240V~,4P 415V~ |
| Insulation voltage Ui | 500V |
| Rated frequency | 50/60Hz |
| Rated residual operation current(I n) | 30mA |
| Rated residual making and breaking capacity (I m) | 500A(In≤40A), 10In(In＞40A) |
| Short-circuit current Inc= I c | 10000A |
| SCPD fuse | 10000 |
| Break time under I n | ≤0.1s |
| Rated impulse withstand voltage(1.5/50) Uimp | 4000V |
| Dielectric test voltage at ind.Freq. for 1min | 2.5kV |
| Electrical life | 2,000 Cycles |
| Mechanical life | 4,000 Cycles |
Installation
| Contact position indicator | Yes |
| Protection degree | IP20 |
| Ambient temperature(with daily average≤35°C) | -5°C~+40°C |
| Storage temperature | -25°C~+70°C |
| Terminal connection type | Cable/Pin-type busbar/U-type busbar |
| Terminal size top/bottom for cable | 35mm2 18-3AWG |
| Terminal size top/bottom for busbar | 35mm2 18-3AWG |
| Tightening torque | 2.5Nm 22In-lbs |
| Mounting | On DIN rail EN60715(35mm) by means of fast clip device |
| Connection | Power supply in both directions |
Tripping Current Range
Tripping | Lagging Angle | I△n＞0.01A | I△n≤0.01A |
Current | 0° | 0.35I△n≤I△≤1.4I△n | 0.35I△n≤I△≤2I△n |
Range | 90° | 0.25I△n≤I△≤1.4I△n | 0.25I△n≤I△≤2I△n |
| 135° | 0.11I△n≤I△≤1.4I△n | 0.11I△n≤I△≤2I△n |
| Detectable wave form | Pulsating direct current sensitive | Surge current proof |
B class
Tripping is ensured for sinusoidal AC residual currents pulsed DC
residual currents,alternating residual sinusoidal currents up to
1000Hz,pulsating direct residual currents and for smooth direct
residual currents,whether applied suddenly or increasing slowly. | ![]() 
They react to AC and pulsating DC fault current which reach 0 or
almost 0 within one time period of the mains frequency. | ![]() 
RCCB’s surge capacity.
Not tripping at standardized 8/20 υs surge-current waves acc.to VDE
0432 Part 2 with surge current values of up to 250A. |
Circuit Diagram
What are the effects of DC residual fault current on RCDs?
it might be worth thinking about some older models of earth fault
loop impedance testers, which could cause the RCD to operate
unintentionally. To prevent this, some types of earth fault loop
impedance testers imposed a DC current on the AC test current. This
DC current saturated the magnetic core of the RCD preventing it
from tripping under the test condition.
Where equipment produces an element of residual DC, for example,
variable-speed drives is connected to the electrical installation,
the DC component can saturate the magnetic core and effectively
blind or locks the RCD. This is known as ‘blinding’ and could
either prevent the RCD from operating or reduce the sensitivity
resulting in a dangerous situation.
Application
Construction sites
Agricultural and horticultural premises
Conducting locations with restricted movement
Caravan and camping parks
Exhibition shows and stands
Outdoor lighting
Marinas
Medical locations
Solar Photovoltaic system power supplies
Mobile or transportable units
Electric vehicle charging installations
Temporary installations for structures, amusement devices and
booths at fairgrounds, amusement parks and circuses, and
Floor and ceiling heating systems.
Certification:TUV
