• Preventive fire and system protection
• Detection of symmetric and asymmetric insulation faults
• Quick fault localisation through earth fault detection to L+ and L-
• Universal in non-earthed AC, DC, AC/DC up to 300 V or more  
• Easy adjustment of response values and setting parameter via rotational switch and menu display
• Suitable for large leakage capacitances up to 1000 µF
• Optimised reaction time for large leakage capacitances
• Monitoring also with voltage-free mains
• Measuring circuit L(+)/L(-) broken wire detection (can switched off)
• Protective conductor PE1/PE2 broken wire detection (can't switched off)  
• Insulation monitoring according to IEC/EN 61557-8 • With connection facility of an external coupling device RP 5898 for voltages up to 1000 V
• Trigger output for insulation fault locating system
• 2 separate adjustable response thresholds (using e.g. for pre-Alarm and Alarm)
• Setting range of 1st response value (Pre-Alarm): 20 kΩ … 2 MΩ
• Setting range of 2nd response value (Alarm): 1 kΩ … 250 kΩ
• 2 changeover contacts für insulation failures-Pre-Alarm and -Alarm
• Energized or de-energized on trip can be selected for indicator relay
• Display for indication of measured value, device parameters and device status
• Setting the max leakage capacitance to shorten the response time
• Automatic and manual device self-test
• Alarm storage selectable
• Protection against manipulation by sealable transparent cover
• External control input for combined Test-/Reset-button
• 3 wide voltage input for auxiliary voltage

• EN 61 810-1, Contacts up to 4 changeover contacts
• Pushbutton for manual actuation of the contact
• Operating position  display 
• Optionally for switching low loads e.g. HQ lamps
• Optionally for switching large inductive dirct current loads
• IK 8701: width 17, 5 mm
   IL 8701:  width 35 mm
   IN 8701: with 52, 5 mm
• IK 8701: width 17, 5 mm

Input
• Nominal voltage U_N:        AC 24,42, 230V, DC 12, 24V
                                      other voltages available on request
• Voltage range:                0,9 ... 1,1 U_N
• Nominal consumption:      AC 1,8 VA/DC 1,5 W
• Nominal frequency:          50 or 60 Hz

• According to IEC/EN 61557 • DC Volt up to 12 ... 280 V
• Wide input range U_N DC 12 ... 280 V-Measuring range 20 ... 500 kΩ
• Adjustable tripping value R_AL of 5 ... 200 kΩ
• Ground fault indication for L+and  L- allows fast fault finding
• Without auxiliary supply • DE-energised on trip • 2 changeover contacts
• Automatic or manual reset, programmable • With  test and reset buttons
• Connection for external test and reset button possible
• galvanic separated AC or DC auxiliary supply available as option
• adjustable time delay as option • 2 Models available:
  IL5881:   61 mm deep 
 SL5881:  98 mm deep   

• According to EN 61 810-1 • Manual operation possible
• Contact position indication via control lever
• 4NC contacts, 4 NO contacts 
• Width 45 mm

Input
• Nominal voltage U_N:       AC 24,42, 110, 127, 230, 240 V  
                                       DC 12, 24, 60, 110, 220, 240 V
•Voltage rang:                  0,8... 1,1 U_N
• Nominal consumption:   AC 230V / 3VA
                                       DC 220V / 3 W                                     
• Nominal frequency:         50/60 Hz
• Frequency range:           ±5%

• AC and DC current, ranges from 2 mA to 25 A
• BA 9053 optionally with 3 current range 0,1 to 10A
• BA 9053 optionally with safe separation to VDE 0106 part 101
• BA 9053 optionally with galvanic separated DC auxiliary supply
• MK 9053 optionally with remote potentiometer
• Open circuit operation
• Optionally closed circuit operation
• Hingh overload operation
• Permissible frequency range of the measuring current up to 400Hz
• Optionally with time delay
• LED indicators for operation and contact position
• Width MK 9053:       22,5 mm
  Width BA 9053:          45 mm

• Under and overvoltage, Asymmetry, Phase failure
• Intensitive to hermonics up to distortion factor K 20%
• Release time adjustable between 0,1 ... 5 s  
• One LED in ease for
  -  Auxiliary voltage A1/A2
  -  Overvoltage U_max.
  -  Overvoltage Umax.
  -   Undervoltage Umax.
  -  Asymmetry / Phase sequence / Power failure
  -  Contact position
• Closed circuit operation  • Available open circuit operation
• 2 changeover contacts   • Width 45 mm

Input
• Nominal voltage U_N:      
L1/L2/L3                        3Ac 230,400,690 V                
Overload capacity of       1,5/60U_N /2U_N (10S)max. 1000 V
Nominal frequejmcy U_N   50/60 Hz
Frequency range of U_N    45...65 Hz
Accuracy:                      ≤±0,5% of  U_N
Power consumption           L1 approx. 0,5 mA
                                     L2 approx. 0,5 mA
                                     L3 approx. 0,8 mA

• Single-phase AC or DC
• Measuring ranges from 24 to 400V
• Without auxiliary supply
• BA 9036 optionally available with adjustable time delay at 
  response or release value
• BA 9036 with LED indicators for operation and state of contacts
• BA9036 :          2 changeover contacts
• AI936 :            1 changeover contact

Input
• Nominal voltage U_N:    AC42, 110, 127, 230, 240, 290, 400V       
                                    DC 24, 48, 60, 110*,127*,220*,240V*         
                                    BA9036:
                                    DC 110V*: ZWS 20 SL 1,5 kΩ 20 W
                                    DC 127V*: ZWS 20 SL 1,6 kΩ 20 W    
                                    DC 220V*: ZWS 20 SL 3,9 kΩ 35 W
                                    DC 240V*: ZWS 20 SL 4,7 kΩ 35 W
                                    AI936:
                                    DC 110V*: ZWS 20 SL 1,5 kΩ 20 W
                                    DC 220V*: ZWS 20 SL 3,9 kΩ 35 W
                                    *( with external drop resistor)

• Measures arithmetic mean value
• Adjustable operate of 3 AC 100/57 to 500/290V
• For 3p 3w or 3p 4w systems
• BA 9043 optionally with adjustable time delay
• Closed circuit operation
• LED indicator for operation and state of contact
• Frequency up to 400 Hz    • Width 45 mm.
Input
• Nominal voltage U_N:           
BA9043, BA9043/002                  
AA9943:                            3/NAC 100/57V;230/127V;400/230V 
                                        415/240V;440/254V;500/290V
                                        50/60Hz
                                        ( can be used up to 400 Hz )

• 3XAC 230V to 500V 
• Detection of voltage asymmetry - wrong phase sequence - phase failure
• Detection of feedback voltage
• BA 9042 with adjustable time delay   • Closed circuit operation
• BA9042 LED indicators for operation and state of contacts
• Width 45 mm
Input
• Nominal voltage U_N:          3 AC 190, 230, 400, 415, 440, 500 V
• Voltage range:                  0,8 ...1,1 U_N
• Nominal consumption:       ≤50/60Hz 
• Frequency range:              ±5%

• Detection of wrong phase sequence • 1 or 2 changeover contacts
• Width 45 mm
Input
• Nominal voltage U_N:          3 AC 190, 230, 400, 415, 440, 500 V
• Voltage range:                  0,8 ...1,1 U_N
• Nominal frequency of U_N:  50Hz ( 60 Hz on request )
• Frequency range:              ±5%
• Nominal consumption:       <3,5 VA