Bender COMTRAXX cme420 User Manual
Manual
CME420
Multi-functional current relay, AC,
overcurrent/undercurrent/
window discriminator function
CME420_D00034_00_M_XXEN/07.2013
Bender GmbH & Co. KG
Londorfer Str. 65 • 35305 Gruenberg • Germany
Postfach 1161 • 35301 Gruenberg • Germany
Tel.: +49 6401 807-0
Fax: +49 6401 807-259
E-Mail: info@bender-de.com
Web: http://www.bender-de.com
© Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission
of the publisher.
Subject to change!
Table of Contents
1. How to use this documentation effectively ................................................ 5
1.1 How to use this manual ................................................................................. 5
1.2 Symbols ............................................................................................................... 5
1.3 Intended use ...................................................................................................... 6
1.4 Information about factory setting ............................................................. 6
2. Safety information ........................................................................................... 7
2.1 Safety instructions ........................................................................................... 7
2.2 Work activities on electrical installations ................................................ 7
3. Function ............................................................................................................. 9
3.1 Device features ................................................................................................. 9
3.2 Function ............................................................................................................... 9
3.2.1 Automatic self test ........................................................................................ 10
3.2.2 Manual self test .............................................................................................. 10
3.2.3 Malfunction ..................................................................................................... 10
3.2.4 Specify the number of reload cycles ...................................................... 11
3.2.5 Erasable history memory ............................................................................ 11
3.2.6 Assigning alarms to the alarm relays K/1K2 ........................................ 11
3.2.7 Residual current monitoring in window discriminator mode ...... 11
3.2.8 Time delays t, ton and toff ......................................................................... 12
3.2.9 Password protection (on, OFF) ................................................................. 12
3.2.10 Factory setting FAC ...................................................................................... 12
3.2.11 Display accuracy ............................................................................................ 12
4. Installation and connection ......................................................................... 13
5. Operation and setting ................................................................................... 15
5.1 Used display elements ................................................................................ 15
5.2 Function of the operating elements ...................................................... 16
CME420_D00034_00_M_XXEN/07.2013
3
Table of Contents
5.3 Menu structure ............................................................................................... 17
5.4 Display in standard mode ......................................................................... 18
5.5 Display in menu mode ................................................................................ 19
5.5.1 Parameter query and setting: overview ................................................ 19
5.5.2 Switching over from overcurrent to undercurrent operation or to
window operation ......................................................................................... 21
5.5.3 Response value setting for overcurrent: ............................................... 22
5.5.4 Setting the fault memory and operating principle of the alarm
relays .................................................................................................................. 23
5.5.5 Assigning alarm categories to the alarm relays ................................. 24
5.5.6 Setting the time delays ............................................................................... 26
5.5.7 Changing from overcurrent operation to window operation ...... 27
5.5.8 Setting the transformation ratio for external current transformer ...
28
5.5.9 Re-establishing the factory settings ....................................................... 30
5.5.10 History memory query ................................................................................. 30
5.6 Commissioning .............................................................................................. 31
5.7 Factory setting ............................................................................................... 31
5.8 Timing diagram: Current monitoring ..................................................... 32
6. Technical data ................................................................................................ 33
6.1 Data in tabular form ..................................................................................... 33
6.2 Ordering information ................................................................................... 36
4
CME420_D00034_00_M_XXEN/07.2013
1. How to use this documentation effectively
1.1 How to use this manual
This manual is intended for experts in electrical engineering and electronics!
This manual describes the multi-functional current relay CME420. It must be
kept ready for referencing in the immediate vicinity of the device.
1.2 Symbols
In order to make it easier for you to find specific text passages or references in
this manual and for reasons of comprehensibility, important information is
emphasized by symbols. The meaning of these symbols is explained below:
The warning symbol indicates a potential dangerous situation that may result in bodily injury and/or damage to
property.
Observe the associated safety instructions!
Information intended to assist the user to make optimum
use of the product are marked with the Info symbol.
CME420_D00034_00_M_XXEN/07.2013
5
How to use this documentation effectively
1.3 Intended use
The current monitor is designed to monitor the threshold values of AC currents for overcurrent and undercurrent conditions. In case of direct measurement, currents up to 16 A (screw-type terminals) resp. 12 A (push-wire
terminals) can be continuously monitored. For indirect measurement by
means of a current transformer, a transformation ratio factor up to 2000 can
be set. The device allows pure overcurrent and pure undercurrent operation,
as well as window operation between two adjustable response values. The
device is factory set to overcurrent operation.
1.4 Information about factory setting
The page 31 provides a summary of all factory settings.
If you want to reset the current monitor to factory settings refer to page 30.
6
CME420_D00034_00_M_XXEN/07.2013
2. Safety information
2.1 Safety instructions
In addition to this data sheet, the documentation of the device includes a
sheet entitled "Important safety instructions for BENDER products“.
2.2 Work activities on electrical installations.
Danger of electric shock!
Touching live parts will cause danger of electric shock
with fatal consequences. All work activities on electrical
installations as well as installation activities, commissioning activities and work activities with the device in
operation may only be carried out by electrically skilled
persons!
Observe the relevant regulations applying to work on electrical instal-
lations, in particular DIN EN 50110 or its subsequent regulation
If the equipment is used outside the Federal Republic of Germany, the
respective national standards and regulations are to be observed. The
European standard EN 50110 is recommended to be used as a directive.
CME420_D00034_00_M_XXEN/07.2013
7
Safety information
8
CME420_D00034_00_M_XXEN/07.2013
3. Function
3.1 Device features
Undercurrent or overcurrent monitoring in AC systems, < I or > I and
current monitoring with window discriminator function
Indirect current monitoring by means of a current transformer,
suitable for transformation ratio factor 1…2000
Adjustable switching hysteresis
r.m.s. value measurement AC
Continuous self monitoring
Starting delay, response delay and delay on release
Measured value display via multi-functional LC display
Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2)
N/C operation or N/O operation selectable
Fault memory behaviour selectable
Password protection against unauthorized parameter changing
Sealable transparent cover
Two-module enclosure (36 mm)
With push-wire terminals: two terminals per connection
3.2 Function
Once the supply voltage is applied, the starting delay "t" is activated. Measured values changing during this time do not influence the switching state of
the alarm relays.
The devices provide two separately adjustable measuring channels (overcurrent/undercurrent). When the measured value exceeds (ALARM 1) resp. drops
below (ALARM 2) the adjusted threshold value, the time of the response delays "t
switch and the alarm LEDs light. If the measured value falls below or exceeds
" begins. After the expiry of the response delay, the alarm relays
on 1/2
CME420_D00034_00_M_XXEN/07.2013
9
Function
the adjusted delay on release (response value plus hysteresis) after the alarm
relays have switched, the delay on release starts "t
the alarm relays switch back to their initial position. With activated fault mem-
". After the expiry of "t
off
off“,
ory, the alarm relays do not change their actual state until the reset button R
is pressed.
3.2.1 Automatic self test
The device automatically carries out a self test after connecting to the system
to be monitored and later every 24 hours. During the self test internal functi onal fau lts o r co nnec tio n fau lts will be d eter min ed an d wi ll a ppea r in form of
an error code on the display. The alarm relays are not checked during this test.
3.2.2 Manual self test
After pressing the internal test button for > 1.5 s, a self test is performed by the
device. During this test, internal malfunctions will be determined and appear
in form of an error code on the display. The alarm relays are not checked during this test.
While the test button T is pressed and held down, all device-related display elements appear on the display.
3.2.3 Malfunction
In the event of an internal malfunction, all three LEDs flash. An error code appears on the display (E.02…E.32).
Error code Meaning Action
E.02
E.03…E.32
10
Fault occured
during manual self test
Check device connection. After eliminating the fault, the error code will be automatically deleted.
Carry out a reset. Reset the device to factory setting. After eliminating the fault,
the error code will be automatically
deleted.
CME420_D00034_00_M_XXEN/07.2013
Function
If the fault continues to exist, please contact the Bender Service.
3.2.4 Specify the number of reload cycles
If faults occur only temporarily, but recurrently, in the system being monitored, with deactivated fault memory M, the alarm relays would switch synchronously to the error status.
RL in the out menu can be used to limit the number of these changeover processes. As soon as the specified number of processes is exceeded, the fault
memory will come on and an activated alarm remains stored.
3.2.5 Erasable history memory
The first alarm value that occurs will be entered in this memory. The memory
can be cleared via the menu HiS.
3.2.6 Assigning alarms to the alarm relays K/1K2
Different alarm categories can be assigned to the alarm relays K1/K2 via the
menu "out".
3.2.7 Residual current monitoring in window discriminator mode
Change the measuring principle by selecting the window mode (SEt / In). In
the window discriminator mode, the threshold values I1 and I2 represent the
upper and the lower value. If the measured value is not within this area, an
alarm is initiated by the device (see page 27).
CME420_D00034_00_M_XXEN/07.2013
11
Function
3.2.8 Time delays t, ton and t
The times t, ton and t
described below delay the output of alarms via LEDs
off
off
and relays.
Starting delay t
After connection to the supply voltage U
, the alarm indication is delayed by
S
the preset time t (0…300 s).
Response delay t
If the current value exceeds or falls below the threshold value, the current
monitor does not initiate an alarm before the response time t
A set response delay t
time t
and delays alarm signalling (total delay time tan = tae + ton).
ae
on1/2
(0… 300 s ) add s up to the d evic e-rel ated oper ating
on1/2
has elapsed.
an
If the fault does not continue to exist before the time of the response delay has
elapsed, an alarm will not be indicated.
Release delay t
off
When no alarm exists after deactivating the fault memory, the alarm LEDs will
go out and the alarm relays switch back to their initial position. After activating the release delay (0…300 s), the alarm state is continuously maintained for
the selected period.
3.2.9 Password protection (on, OFF)
With activated password protection (on), settings can only be carried out
when the correct password (0…999) has been entered.
3.2.10 Factory setting FAC
After activating the factory setting, all settings previously changed are reset to
delivery status.
3.2.11 Display accuracy
The display accuracy of the measured current values depends on the set response values. When an alarm response value I2 of 10 A has been selected,
currents smaller than 350 mA are displayed as < 0.3 A.
12
CME420_D00034_00_M_XXEN/07.2013
Loading...