Mauell MR 10 User manual

Standard Devices
Annunciator
Relays
MR 10 and MRE 10
MR 20 and MRE 20

The contents may be subject to modification for the purpose of technical improvement. The general regulations applicable to installation
and commissioning must be observed. No warranty can be accepted.
The products described in this brochure are intended for industrial use and meet the requirements laid down by the
EU directive 73 /23/ EU (issued by the Council for Coordination of the Regulations of EU Member Countries regarding the
electrical equipment for use within certain voltage limits, revised by directive 93/68/ EU issued by the Council).

Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21 3
Contents Page
Annunciator relay MR 10
Application 4
Construction 4
Function 4
Features 4
Mounting 4
Relay banks 4
Ground fault annunciator relay MRE 10
Application 4
Construction 4
Mounting 4
Annunciator relay MR 20
Application 4
Construction 4
Mounting 4
Ground fault annunciator relay MRE 20
Application 5
Construction 5
Mounting 5
Technical data 5
Diagrams MR 10 6
Legend plate 6
Diagrams MRE 10 7
Screw positions from normally energized or de-energized 7
Legend plate 7
Diagrams MR 20 8
Diagrams MRE 20 8
Legend plate 8
Dimension prints for individual relays
Surface mounting 9
Flush mounting 9
Plug-in type 9
Dimension prints for relay banks
Housing for flush mounting 10
Annunciator relay views 11
Table of contents

4Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21
Application
The annunciator relay MR 10 is used for indication of fault and
operating conditions in control rooms, switchboards as well as
mimic diagrams. Because of its large indicating area and the rigid
design, this relay is ideally suited for any environmental condition.
Alarge number of annunciator relays can be assembled in banks.
Construction
The annunciator relay MR 10 is a semi-automatic relay that can be
activated optionally by NO or NC input contacts. The required
control is adjusted by simply changing the position of two operating
screws on the bell crank. For the optical display no additional
auxiliary voltage is necessary beside the coil energizing voltage.
This is especially important for applications where the relay is used
for the supervision of voltages.
Function
In the normal condition the indicating area is black. With the action
of the relay the indicating flag (a white area with legend) becomes
visible. Simultaneously the auxiliary contacts are actuated. By
pressing the reset button below the indicating flag the message is
acknowledged. The indicating flag remains visible but with an
additional area of red/white hatched lines. Simultaneously the
contacts are restored to their normal position. After clearance of the
fault the indicating flag returns to its normal postion automatically.
In addition to the operation described above the relay is also
available with contacts directly driven by the armature. This type is
used mainly in remote control stations.
Diagrams: pages 6 and 7
Features
Easily exchangeable legend plate. Operational in any position.
Heavy duty contacts. Tropicalized version is available, if desired.
Mounting
Individual relays
Panel surface mounting
Accessories: mounting screws with nuts
Dimension print: page 9
Panel flush mounting
Accessory: brace
Dimension print: page 9
Panel flush mounting plug-in type
Accessories: socket, mounting brackets
Dimension print: page 9
Relay banks
Up to 100 annunciator relays can be installed in one bank.
Dimension print: page 10
Banks of annunciator relays can be installed in steel cabinets for
panel surface mounting, wall surface mounting, wall flush mounting
or for mounting on the floor. Bus-wiring of the relay banks can be
neatly achieved using conducting angles of different heights and
special connecting wires. Relay banks in housings for surface
mounting can be wired in the factory, or by the client.
Supplementary type: Ground fault annunciator relay MRE 10
Application
The annunciator relay MRE 10 is a semi-automatic relay which is
used for ground fault indication in three-phase systems.
Function
The relay is equipped with two coils and must be connected to the
open delta winding of a voltage transformer. The relay responds at
30 V AC. With the responding the second coil is connected in
series with the first to allow operating voltages up to 100 V AC. The
ground fault indication relay can also be supplied for other voltage
ranges. The further functions correspond to relay MR 10.
Diagram: page 7
Mounting
Similar to annunciator relay MR 10
Supplementary type: Annunciator relay MR 20
Application
Similar to annunciator relay MR 10
Function
The annunciator relay MR 20 operates fully-automatically. A
manual reset and a possibility for the adjustment from normally
de-energized to normally energized are not provided. Upon
response the contacts are actuated and the legend becomes
visible. With the clearance of the fault the legend disappears
automatically and the contacts return to their normal position.
Diagram: page 8
Mounting
Similar to annunciator relay MR 10

Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21 5
Supplementary type: Ground fault annunciator relay MRE 20
Application
The annunciator relay MRE 20 is an automatic relay for indicating
ground faults in three-phase systems.
Function
Similar to annunciator relay MRE 10 but without manual reset and
without the possibility of subsequent adjustment from normally de-
energized to normally energized.
Diagram: page 8
Mounting
Similar to annunciator relay MR 10
Technical data
Relay coils
Current type DC or AC (50 c/s or 60 c/s)
Voltage rating (Ur)up to 150 V DC or 230 V AC
Voltage rating with resistor up to 220 V DC
Overvoltage continuous 1,2 x Ur
Response voltage ≤0,8 x Ur
Current rating (Ir) (current coil) up to 6 A DC or AC
Response time 12 to 25 ms
Power consumption at Ur
at DC 0.5 to 1.5W
with series resistor 1 to 2.5 W
at AC
Armature closed 1.4 to 1.8 VA
Armature open 2.8 to 3.6 V A
Contacts
Rush current 10 A DC or AC
Continuous current 6 A DC or AC
Breaking current
220 V DC, L/R = 40 ms 0.3 A
230 V AC cos ϕ= 0,4 6 A
Max. switching voltage 220 V DC or 230 V AC
Momentary contact, closure appr. 60 ms
General data
Protection type IP 40, connections IP 00
(DIN 40050)
Insulation group and group C, 250 V DC/AC
series voltage (VDE 0110/11.72)
Test voltage 2 kV 50 c/s (VDE 0435 a/9.72)
Ambient temperature range -5°C to +40°C
Legend 1- or 2-lines, max. 15 letters per
line
Weight 490/680 g normal execution
with socket

6Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21
1
27
681
27
681
27
68
1
27
681
27
681
27
68
1
27
681
27
681
27
68
1
27
681
27
68
1
27
681
27
68
1
27
68
1
27
81
27
8
1
27
81
27
8
3
4
5
3
4
5
5
4
3
1
27
685
4
3
3
4
5
1
27
83
4
5
3
4
5
1
27
683
4
5
1
27
685
4
3
1
27
685
4
3
3
4
5
3
4
5
3
4
5
3
4
5
5
4
3
5
4
3
1
27
83
4
5
3
4
5
Diagram-no Relay position
Normal Alarm Acknowledged
10-1 normally de-energized
10-1 normally energized
10-2 normally de-energized
10-2 normally energized
10-2a normally de-energized
10-2a normally energized
10-3 normally de-energized
10-3 normally energized
Diagrams MR 10
Legend plate
coil de-energized coil energized coil energized
coil de-energized coil energized coil energized
coil de-energized coil energized coil energized
coil de-energized coil energized coil energized
Normal Alarm Acknowledged
Black White White/Red
coil energized coil de-energized coil de-energized
coil energized coil de-energized coil de-energized
coil energized coil de-energized coil de-energized
coil energized coil de-energized coil de-energized

Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21 7
1
27
85
4
31
27
85
4
3
1
27
85
4
3
1
27
85
4
3
1
27
85
4
31
27
85
4
3
1
27
681
27
681
27
683
4
53
4
53
4
5
1
27
681
27
681
27
683
4
53
4
53
4
5
3
4
53
4
5
2
1
2
1
3
4
5
2
1
Diagrams MR 10 and MRE 10
Diagrams MR 10
Diagram-no Relay position
Normal Alarm Acknowledged
Diagrams MRE 10
Diagram-no
Screw position from normally energized or de-energized
Can be retrospectively changed on site.
Legend plate
10-3a normally de-energized
10-3a normally energized
coil de-energized coil energized coil energized
10-4 normally de-energized
coil de-energized coil energized coil energized
10-1a
Normally de-energized Normally energized
Normal Alarm Acknowledged
Black White White/Red
coil de-energized coil energized coil energized
coil energized coil de-energized coil de-energized
10-4 normally energized
coil energized coil de-energized coil de-energized

8Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21
1
27
8
1
27
8
1
27
681
27
683
4
53
4
5
6 6
1
27
8
1
27
8
6 6
1
27
681
27
683
4
53
4
5
1
27
83
4
51
27
83
4
5
1
27
83
4
51
27
83
4
5
3
4
53
4
5
21 21
Diagrams MR 20 and MRE 20
Diagrams MR 20
Diagram-no Relay position
Normal Alarm
Diagrams MRE 20
Diagram-no
20-1 normally de-energized
20-1a
20-2 normally de-energized
20-3 normally de-energized
20-1 normally energized
20-2 normally energized
20-3 normally energized
coil de-energized coil energized
coil de-energized coil energized
coil de-energized coil energized
coil energized coil de-energized
coil energized coil de-energized
coil energized coil de-energized
coil energized coil de-energized
Legend plate
NO/NC contact input adjustment will be done at our works and
must be stated at the time of order.
Later re-adjustment is only possible at our works!
Normal Alarm
Black White

Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21 9
Dimension prints: Individual relay
Surface mounting
Flush mouting
Rear view
Plug-in type
Rear view Top view
Accessories: 2 cylinder screws M 3 x 25 DIN 84 with nut are
supplied for securing.
*For rear connection 8 insulated connecting bolts
are to be ordered seperatly.
Cutout 61mm x 71mm
Cutout 61mm x 71mm
Accessory: 1 brace
Accessories: socket
mounting bracket
pull-out device
Mounting for board 2,5mm bis 8mm
Mounting for boards over 8mm
Pull-out device will
be mounted of
the housing nut
drilled and sunk for
M5DIN 963
Thread M5
depth 6mm

10 Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21
Dimension print: Relay banks
Housing for flush mounting MR 10 and MR 20
Cutout
Housing
Front frame

Annunciator Relays MR 10, MRE 10, MR 21 and MRE 21 11
Annunciator relay MR 10
for flush mounting Annunciator relay MR 10
plug-in type
Annunciator relay MR 10
with exchangeable flag
Annunciator relay MR 10
with socket, rear view
Annunciator relay MR 10
without housing
Annunciator relay MR 10
without housing, with
momentary contact and socket

06.0010.01E06
Representatives
Germany
Helmut Mauell GmbH
Am Rosenhügel 1–7
D-42553 Velbert
Tel.: [phone]
Fax.: [phone]
Internet: www.mauell.com
E-Mail: [email protected]
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