Introduction And Application

Auto Mains Failure Relay With Engine Protection

AMF & Engine Control Relay Type – AMR1
AMR1 has been designed for the control of emergency and standby power systems. It integrates the functions of engine start / stop relay, engine and alternator supervision and annunciator. The relay has a user friendly MMI in the form of a keypad and a LCD display. The engine start / stop relay element allows the automatic starting of relay when power fails, automatic stopping of the engine when mains return and also the control and interlocking of mains and DG Circuit Breakers. It also includes delayed supervision of oil pressure switch.

Features & Characteristics

  • Micro controller technology
  • Wide range of auxiliary supply: 7 V to 35 Vdc
  • With stands a dip to 0V of auxiliary supply for 1 second
  • Flush mounting
  • Alphanumeric LCD display with keypad for easy of operation
  • Display and supervision of three phase mains voltages for UV, OV & unbalance
  • Display and supervision of D.G voltages for UV, OV
  • Display and supervision of mains & D.G frequency
  • Continuous supervision of mains & D.G breaker status – ensures human / equipment safety
  • Internal interlock for Mains & D.G. breaker for fail safe operation
  • Remote starting and stopping facilities
  • Measuring of different mains and generator parameters
  • True RMS measurement of mains & D.G. voltage
  • Ten internal fault annunciation for start failure, over speed, low battery, stop failure etc
  • Four spare terminals for connecting external fault signals
  • Display and supervision of battery voltage
  • Isolated inputs and outputs
  • Parameter setting from front panel keypad
  • Periodic test feature
  • Seven modes: Automatic, Remote, Manual, Offline, Test , Edit Parameters and Default Mode
  • Over speed indication / shutdown
  • DG starting process supervision
  • Indication of CB status
  • Wide array of time circuits for start delay, stop delay, mains restoration, recooling etc
  • Serial Communication (OPTIONAL)
  • Ignition ON input

Functional Specifications

Sr.No. Parameter Specification
1 Selection mode Auto
2 Manual
3 Off
4 Remote
5 Test
6 Functions View actual values (Default Mode) Mains Voltages
7 Mains Frequency
8 Generator Voltage-Phase Voltage
9 Generator Frequency
10 Battery Voltage
11 View SetParameters(View Para Mode)* Voltage Rated, Upper and Lower
12 Frequency Rated, Upper and Lower
13 Unbalance Limit for Mains Voltage
14 Enable Mains Operat ion on Single
15 Voltage Limit below which frequency
16 Battery voltage Low value
17 Ignition voltage
18 Over Speed Limit
19 Number Of Cranking Attempts
20 Generator Start Delay
21 Generator Cranking Period
22 Stopper Delay
23 Cranking Wait Period
24 Re-cooling Time
25 Generator CB on Delay
26 Generator Tripping Delay
27 Delayed Supervision
28 Generator Off Delay
29 Mains Restoration Time
30 Hooter Reset Time
31 Edit Parameters (Edit Para Mode)* Set all above parameters.
32 View Values (Manual/Diagnostic Mode)* Engine Run Hours
33 GCB Trip Count
34 MCB Trip Count
35 Change Password (Password Mode)* Service password can be modified.
36 Load Default Mode* This mode loads default parameters, supervisor password and resets diagnostics parameter.
37 Select functional mode (Mode Select Mode)* Automatic mode
38 Remote mode
39 Manual mode
40 Offline mode
41 Test mode
42 Supervision Three line voltages of mains
– Voltage band
– Unbalance limit
43 One line voltage of generator
– Voltage band
44 Frequency of mains
– Frequency band
45 Frequency of generator
– Frequency band
46 Battery voltage
-Voltage band

Performance Specifications

Sr.No. Parameter Specification
1 Aux Supply 7.0-35.0 V DC
2 Aux supply Interruption Time 1 second sustain bat tery dip down to zero volts for one second without requiring external capacitor bank.
3 Aux supply Burden < 3 W @ 24 V DC
4 External cap. Bank Not Required
5 Generator Voltage 50 to 300 V AC (Ph-N)
6 Mains Voltage 50 to 300 V AC (Ph-N)
7 Rated Frequency 50 / 60 Hz
8 Voltage Measuring Tolerance +/- 1 %
9 Freq. Measuring Tolerance +/- 0.5 %
10 VBatt Supervision 9.0-35.0 V
11 Tolerance of VBatt Measurement +/- 1 %

Hardware Specifications

Sr.No. Parameter Specification
1 Display 16 characters/row x 2 rows LCD display with built in controller
2 Annunciation using LEDs Voltage
3 Frequency
4 Mains CB
5 Gen CB
6 Battery Voltage
7 Low Oil Pressure
8 Engine Temp. High
9 Low Fuel Level
10 Key Pad 11 Keys Edit Keys 5 Keys Forward, Increment, Decrement, Backward, Enter
11 Control Keys 6 Keys Gen Start, Gen Stop, Open Mains CB, Close Mains CB, Open DG CB, Close DG CB
12 External faults – 4 Opto- isolated I/Ps
13 Controls-3 Opto- isolated I/Ps Emergency Stop
14 Remote Stop
15 Remote Start
16 Feed Back – 3 Opto- isolated I/Ps MCB check back
17 GCB check back
18 Ignition on
19 Relay – 6 nos.
O/P Contact rating
(ALL relays) – 250V AC,
4A resistive
N/O Contacts Starter Motor
20 Fuel Injection
21 Decompression Coil (Stopper)
22 Generator CB
23 Hooter
24 Main CB
25 Communication (OPTIONAL) Serial full duplex RS232
26 Serial Connector 9-pin subminiature D- Connector
27 Storage temp. -40°C – +75°C
28 Operating temp. -20°C – +70°C
29 Connecting terminals 2.5 mm Recommended 2.5 mm conductor
30 Enclosure 1. Flush mounting
31 2. Bezel : (W x H) 144 x 144 mm , Cut out : 138 x 138
32 3. Installation Depth: 110 mm (max.)
33 4. Weight: 0.8 Kg approx.