ManHua

MK3L Residual Current Circuit Breaker

General

RCCB is applicable to electric circuits with rated voltage 230/400V AC, frequency

50/60Hz and rated current upto40Amp.

The RCCB provides indirect protection to the operator's body under such condition

that the exposed live parts should be connected to a proper earthing pole. The

RCCB also provides protection against the fire danger caused by earth fault

current due to function failure of over-current protection device.

Special tips:

1. RCCB with rated sensitivity upto30mAcould be used as supplementary

protecting device in case other protecting device fails its protection against

electric shock.

2. RCCB designed for household installation and other similar application, is for

non-professional operation, and no maintenance is required.

3. RCCB provides no protection against electric shock resulted from direct

contacts of both protected lines, or leakage current between these two lines.

4. Particular devices such as surge protective devices, surge arrester etc are

recommended to install at upstream line to RCCB as precaution against potential

against potential surge voltage and current occurring at its power input side.

5.Satisfying conditions and applications as mentioned above, RCCB with ON-

OFF indicating device is considered suitable for isolation function.

ManHua

Outline and Installation

dimensions

MK3L

Residual Current Circuit Breaker

? Rated conditional short-circuit current:

lnc=Ui c=6000ASCPDfuse 100AGg

? Making and breaking capacity(lm):1.000

? Rated impulse withstand voltage(1.2/50)Uimp(kV);8

? Dielectric test voltage at lnd.freq.for 1 mln.(kV):2.5

? Electrical life:(0-C)10.000

? Mechanical Iife:(0-C)20r000

? Degree of protection:IP40(top).IP20(terminal).with connected conductors

? Mounting posltion:any

? Conductor cross-sections

? Terminal could use for busbar connection thickness (mm):Q.8?2,

wiring(mma):1-25

? Terminals

? Terminal lightening torque(N.m):2.5-4

? The relatatlve humidity Is 95% when ambient temperatureCC): 55

? Storage temperature(r)： -40*+70

? Altitude Max.(meters):2000

Features

? Electromagnetic type .voltage independent.

? The handle being sealable or equipped with padlock bracket avoids dangerous

operation changes(ONZOFF)

? The handle provides a clear Indication of the contact position

? Adequate printing of all data on the front provides long-term identification

Types

Both RCCBs and RCBOs are further divided into types depending on the

operating function:

? Type AC(^]:For which tripping is ensured for residual

sinusoidal allernating current,whether suddenly

applied or slowly rising.

? Type :For which tripping is ensured for residual

sinusoidal alternating currents and residual pulsating

direct current$,whether suddenly applied or slowly rising.

? Type S :For selectivity.wlth time-relay.

Tripping sensitivity data

? RCD with a rated residual current of maximum 30mA are used for personnel,

material and fire protection,as well as for protection against direct contact.

? RCD with a rated residual current of maximum 300 mA are used as preventative

fire protection in case of insulation faults.

? RCD with a rated residual current of 100mA coordinated with the earth system

according to the formula I n 50/R.to provide protection against indirect contacts.

? RCD with a rated residual current of 10 mA a re primarily used In areas that

represent an increased risk for personnel