Function CBS-400B Multi-Channel Earth Leakage Monitoring Relay — 4 Channels, Type B, 30–3000 mA, RS-485 Modbus

The CBS-400B monitors and protects four fully independent circuits for earth leakage, each through its own external toroidal transformer of the Circutor WGB range, and it does so to type B. Circutor rate it to IEC 62020, with type B sensing to IEC 60755. It carries five output relays: four to trip the breaker of each protected channel and one for the adjustable pre-alarm, so a rising leakage can be acted on as a maintenance item instead of as an outage. The leakage current of each of the four channels is measured and displayed separately, and integrated RS-485 Modbus/RTU allows all four to be logged. Sensitivity is adjustable from 30 to 3000 mA. It occupies three DIN modules. It is a type B device: it responds to all forms of residual current — AC, pulsating DC and smooth DC. Smooth DC leakage is the case that matters, because it magnetically saturates the core of a type A or type AC device and blinds it to any further fault. Type B is therefore the correct and often the mandatory choice downstream of frequency converters, rectifiers, EV chargers and photovoltaic inverters. Manufactured by Circutor (Spain) and supplied under the Function brand; the Circutor catalogue reference is CBS-400B. Supplied by cBallast on quote-to-invoice terms; lead time and freight are quoted per RFQ against the destination Incoterm.

Manufacturer part number (MPN)

1602532

Sales unit

pcs

El-nummer (NO)

1602532

ETIM class

SC001444

External power supply required

Yes

Supply voltage AC 50 Hz

195–265 V

Supply voltage AC 60 Hz

195–265 V

Rated operating frequency

50–60 Hz

Voltage type (operating voltage)

AC

Type of electric connection

Screw connection

Rated control supply voltage AC 50 Hz

230 V

Voltage type for actuating

AC

With detachable clamps

Yes

Function

For AC-current system

Rated frequency

50–60 Hz

Indication of insulation value

Yes

Error registration possible

Yes

Number of contacts as normally open contact

5

Width

52.5 mm

Height

118 mm

Depth

74 mm

Country of origin

Spain

Device type

Multi-channel residual current monitoring and protection relay

Number of channels

4, fully independent

Residual current type

Type B (AC, pulsating DC and smooth DC)

Sensitivity range (IΔn)

30 – 3000 mA, with adjustable pre-alarm

Toroidal transformer series

Circutor WGB range (external, ordered separately)

Communications

RS-485, Modbus/RTU

Output relays

5 — 4 channel trip relays + 1 pre-alarm

Standards

IEC 62020; type B sensing to IEC 60755

Mounting

DIN rail, 3 modules

Manufacturer

Circutor, Spain

Manufacturer model

CBS-400B

HS Code

8536.20

• 8433059311612
• El-nr 1602532
• Circutor CBS-400B
• CBS-400B