Bender RCMB101 Manual de usuario

Operating Manual

RCMB101

CCID-20

AC/DC sensitive

residual current monitoring module

for installation into electric vehicle charging stations

Software version D359 V2

TGH1463en/11.2012

©Bender GmbH & Co. KG

Reprinting only with permission

of the publisher.

Subject to change!

Bender GmbH & Co. KG

Londorfer Str. 65 • 35305 Grünberg • Germany

Postfach 1161 • 35301 Grünberg • Germany

Tel.: +49 6401 807-0

Fax: +49 6401 807-259

E-mail: [email protected]

Web: http://www.bender-de.com

Table of Contents

TGH1463en/11.2012

1. Safety instructions .................................................................................................. 5

1.1 How to use this manual ......................................................................................................... 5

1.2 Explanation of symbols .......................................................................................................... 5

1.3 Intended use .............................................................................................................................. 5

1.4 Warranty and liability ............................................................................................................. 6

1.5 Personnel .................................................................................................................................... 6

1.6 Work activities on electrical installations ........................................................................ 6

2. Function ....................................................................................................................7

2.1 Device features ......................................................................................................................... 7

2.2 Description of function .......................................................................................................... 7

2.3 Starting sequence .................................................................................................................... 8

2.4 Analogue voltage output X1 ............................................................................................ 10

2.5 Switching output X12 .......................................................................................................... 10

2.6 Control input X10 .................................................................................................................. 10

2.6.1 Cyclical self test ...................................................................................................................... 10

2.6.2 Reset function ........................................................................................................................ 11

2.6.3 Impulse duration for activating a reset ......................................................................... 11

2.6.4 Self test: Reset and subsequent calibration of the RCMB101 ............................... 12

2.6.5 Functional test switching output X12 ........................................................................... 14

2.7 Values outside the permissible measuring range ..................................................... 15

2.8 Measuring range and switching times .......................................................................... 15

2.9 Fault detection and the resulting technical reactions ............................................. 16

Table of Contents

4TGH1463en/11.2012

3. Installation and connection ............................................................................... 17

3.1 Installation ................................................................................................................................ 17

3.2 Connection assignment ...................................................................................................... 17

3.3 Example applications ........................................................................................................... 18

3.3.1 The circuit-breaker is controlled by the charging control electronics and the

switching output X12 ........................................................................................................... 18

3.3.2 The circuit-breaker is controlled by the charging control electronics ............... 18

4. Technical data ....................................................................................................... 19

4.1 Data in tabular form .............................................................................................................. 19

4.2 Ordering information ........................................................................................................... 20

4.3 Approvals/certifications ...................................................................................................... 20

4.4 Dimension diagrams ............................................................................................................ 21

TGH1463en/11.2012

1. Safety instructions

1.1 How to use this manual

This manual is intended for electrically skilled persons working in electrical engineering and

electronics!

This operating manual describes the AC/DC sensitive residual current monitoring module RCMB101

with the software version indicated on the cover page. The functions and processes described may

vary from those featured in other versions.

Please read this operating manual before using the device. This document must be kept in an

easily accessible location near to the equipment.

1.2 Explanation of symbols

To make it easier for you to understand and revisit certain sections of text and instructions in the

manual, we have used symbols to identify important instructions and information. The meaning of

these symbols is explained below:

1.3 Intended use

The AC/DC sensitive residual current monitoring module RCMB101 is used for monitoring residual

currents in charging stations for electric vehicles where direct and/or alternating residual currents

are likely to occur the value of which is constantly greater than zero. This also applies to the detection

of leakage currents. The residual current monitoring module is to be mounted into the charging

station as an open-type circuit board. The electrical connection is established by means of a plug-in

connector suitable for PCBs.

Information intended to assist the user to make optimum use of the product are

marked with the Info symbol.

The warning symbol indicates a potential dangerous situation that may result in

bodily injury and/or damage to property.

Observe the associated safety instructions!

Safety instructions

6TGH1463en/11.2012

1.4 Warranty and liability

Bender devices are designed and built in accordance with the state of the art and accepted rules in

respect of technical safety. However, the use of such devices may introduce risks to the life and limb

of the user or third parties and/or result in damage to Bender devices or other property.

Only use Bender equipment:

As intended

In perfect working order

In compliance with the accident prevention regulations and guidelines applicable at the loca-

tion of use

Eliminate all faults immediately which may endanger safety. Do not make any unauthorised changes

and only use replacement parts and optional accessories purchased from or recommended by the

manufacturer of the equipment. Failure to observe this requirement can result in fire, electric shock

and injury.

Although great care has been taken in the drafting of this operating manual, it may nevertheless

contain errors and mistakes. The Bender Group cannot accept any liability for injury to persons or

damage to property resulting from errors or mistakes in this manual.

1.5 Personnel

Only appropriately qualified personnel may work on the Bender product.

Qualified means familiar with the installation, commissioning and operation of the product and with

training appropriate to the work. Personnel must have read and understood the safety section and

warning information in this operating manual.

1.6 Work activities on electrical installations

Compliance with applicable regulations governing work on electrical installations, and with the

regulations derived from and associated with them, is mandatory. EN 50110 is of particular

importance in this regard.

If the device is being used in a location outside the Federal Republic of Germany, the applicable

local standards and regulations must be complied with. European standard EN 50110 can be

used as a guide.

Risk of electric shock!

Failure to carry out work on electrical installations properly and correctly can

put life and limb at risk and may damage the device!

Only skilled persons are permitted to carry out the work necessary to install,

commission and run a device or system.

TGH1463en/11.2012

2. Function

2.1 Device features

Suitable for electric vehicle charging stations

AC/DC sensitive measured value acquisition 0…500 Hz

Internal measuring current transformer with test winding and screening for electrical interfer-

ence field reduction, inside diameter 15 mm

Measuring range 0…20 mA, with analogue output voltage

Switching signal at the output according to the requirements of UL 2231-2, type CCID20

Latch locks at the measuring current transformer allow easy installation of the module

Monitoring of the connection to the measuring current transformer

Reset via control input X10

2.2 Description of function

The residual current monitoring module detects the residual current caused by leakage and residual

currents in the conductors passed through the measuring current transformer. The residual current

monitoring module measures AC and DC currents. The r.m.s. value is determined by the DC

components included in the residual current and by AC components which are below 500 Hz.

A signal in proportion to the r.m.s value is provided across the voltage output X1. The second output

(X12) provides a switching signal when values are outside the permissible measuring range or in

case of high or soaring residual currents.

The control input (X10) will also be queried. Depending on the sequence of the HIGH/LOW levels

applied, the RCMB101 can be reset with or without a self test, calibration and activation of the test

winding (test current supply).

Function

8TGH1463en/11.2012

2.3 Starting sequence

Once the residual current monitoring module is connected to the power supply, the automatic

starting sequence begins.

The residual current monitoring module RCMB101 is supplied by an external power supply.

Supply voltage fluctuations may influence the residual current measurement. To exclude this effect

(particularly during calibration), the starting sequence is as follows:

Supply voltage measurement

1. Once a supply voltage +Us≥ 5 V is applied, the starting sequence begins .

2. The residual current monitoring module disables the open collector switching output X12

(HIGH level).

Calibration

3. When a supply voltage of +Us ≥11 V is reached, calibration (offset measurement) is started by

the module. It must be ensured that no residual current is flowing.

4. Once calibration is complete, the supply voltage measurement will be repeated. Where the

condition +Us ≥11 V cannot be fulfilled, calibration will be repeated. After successful calibra-

tion, the residual current monitoring module enables the switching output X12 (LOW level).

Test current supply

5. The test winding is supplied with test current for 2 s (two-stage test current). The resulting

measured value is available at X1 and the corresponding switching state is applied to output

X12.

When the current is supplied to the test winding, X1 drops to LOW level. X12 will only be enabled

when a HIGH level is applied at X10.

Other features

6. When the test winding is supplied with current, the behaviour of the residual current module is

determined by the control input X10:

Note:

Users must ensure that the supply voltages +Usund -Usat X2 / X11 are strictly

observed. Otherwise the signals at the outputs X1 and X12 may be outside the

tolerance range!

Test current supply Test current Duration Output X1 Output X12

First sequence 11 mA, 400 Hz 1 s 1.2 V does not switch

Second sequence DC 22 mA 1 s 4.85 V switches after max. 800 ms

Impulse duration at X10

(HIGH) Behaviour of the RCMB

≤50 μs The input is monitored until an impulse of T ≥50 μs is applied.

50…100 μs Self test (supply voltage measurement, calibration and test current

supply) will be repeated

> 100 μs… < 5 ms Control input X10 will be queried again

> 5 ms Residual current measurement starts after 10…11 ms

Function

TGH1463en/11.2012

Fig. 2.1: Starting sequence

Switch on the test current

in the test winding

Starting sequence

2 s

Calibration

(offset measurement) 2 s

0.5 s

X12 = HIGH

Delay

X12 = LOW

0.05...0.

1 ms

X12 = HIGH

10...11 ms

X10 < 50 μs

HIGH ?

yes

X10 > 5 ms HIGH

yes

+Us≥11 V

yes

+Us≥11 V

X10 > 100 μs

HIGH ?

+Us≥5 V

yes

Switch off the test current

in the test winding

0.1 s

2.0 s

0.1 s

Start ∆I measurement

Test current

measurement

Function

10 TGH1463en/11.2012

2.4 Analogue voltage output X1

The r.m.s. value of the currently measured residual current is available at X1 as a proportional output

voltage.

If the residual current monitoring module detects values outside the measuring range, the analogue

output X1 will be set to 4.85 V. As soon as the residual current drops below 10 mA, the output X1 will

still remain at 4.85 V for approx. 1.2 s before the currently measured value will be displayed.

Therefore, the shutdown can be reliably evaluated by the charging control electronics.

Output voltages < 150 mV or > 4.85 V signal a short-circuit, an interruption or a possible fault of the

residual current module. For details about fault detection, refer to page 16.

2.5 Switching output X12

When values are outside the measuring range ( IΔn ≥ 20 mA ) or a fault is detected by the monitoring

module, the switching output X12 will be disabled and signalled by the open collector output X12.

Fig. 2.2: Open collector

Only when the measured value of the residual current falls below 10 mA for a period of 1.2 s, the

switching output X12 will be enabled again by activating the transistor (LOW level at X12).

In order to check the switching capacity of the open collector output X12, a functional test according

to chapter 2.6.5 can be initiated via the control input X10.

2.6 Control input X10

2.6.1 Cyclical self test

Before each charging cycle, a self test has to be activated (reset with subsequent calibration) by the

charging control electronics via the input X10. This requirement can only be met when sufficient

supply voltage +Us/ -Usis available (> 11 V).

The sequence of the measurement is described in chapter 2.6.4. During the calibration process, also

the digital output X12 switches. The cyclical self test is used to check the measuring function of the

device. This is a measure to ensure that the protective function is guaranteed.

X12

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