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IL04915001E

 

 

 

Effective 7/09 

 

1.6 Operating Modes 

The D64RPB30 has four distinct Operating 
Modes. All modes have this in common: 
 
-  In the ‘reset state’ of the relay the normally 

open contact is open and the normally closed 
contact is closed. 

-  In the ‘tripped state’ of the relay the normally 

open contact is closed and the normally 
closed contact is open. 

The different modes are: 

1.  Continuous Non-Failsafe operation 

After a trip the relay remains in the tripped 
state and the red LED remains active until 
the reset button is pressed. When control 
voltage is removed the relay goes to the 
reset state unconditionally. 

2.  Continuous Failsafe operation 

Same as mode 1, except when control 
voltage is removed the relay goes to the 
tripped state unconditionally. 

3.  Pulsed Non-Failsafe operation (for shunt 

controlled breakers, or alarm only purposes)  
When a trip occurs, the relay goes to the 
tripped state for 0.5 seconds, then resets. 
Regardless of the cause of trip, should 
measured current remain or go above the set 
G/F trip level, this pulse is repeated every 3 
seconds. The red LED remains active until 
the reset button is pressed. This allows the 
user to verify which D64RPB30 tripped its 
associated breaker. If the reset button is not 
pressed (LED continues to show cause of 
trip), the functionality of the trip circuit is not 
compromised. That is, in case of a trip 
condition the relay will correctly issue a 
pulse, even if the red LED is active. 
When control voltage is removed the relay 
will not issue a pulse (but note that this will 
reset the red LED). 

4.  Pulsed Failsafe operation (for shunt 

controlled breakers, or alarm only purposes)  
Same as mode 3, except when control 
voltage is removed the relay will issue a 0.2-
0.3 second pulse. This means that, when 
control voltage is restored after a trip due to 
loss of control voltage, the contact will remain 
open. This avoids the 500 ms delay in 
contact transfer that occurs when control 
power is restored on continuous failsafe 
operation (in 2 above).     

If the D64RPB30 is to be used for alarm only 
purposes (rather than to interrupt ongoing 
processes), and the alarm has to have an auto-
resetting operating mode, select one of the 
Pulsed modes. The pulses will be repeated as 
long as current is above the set G/F level. Note 
that a faulty connection of the external CT would 
only generate one pulse. Also, note that with 
Ground faults the red LED will always show the 
‘trip failed’ alarm. 

1.6 Tamper proof dipswitches 

Eight dipswitches are used to program the 
D64RPB30. However, to discourage 
unauthorized manipulation, the preselected 
settings can only be changed by going through 
the procedure outlined below. 
 
When an attempt is made to change the settings 
without going through this procedure, the green 
and red LEDs start to blink alternately until the 
switches are returned to their original positions. 
Should the switches be left in other than the 
preselected settings, the preselected settings, 
being stored in non-volatile memory, remain 
valid. 
 
The proper procedure to change settings is as 
follows: 
1.  The dipswitches are placed in the new 

positions (ignoring the blinking LEDs). 

2.  Within 15 seconds after the last change was 

made (or control power was applied), the 
system is brought in test mode using the 
local pushbutton, causing the new settings to 
become active. Since the system will trip 
now, changing the settings cannot go by 
undetected. See section 1.4 for a description 
of how to invoke test mode. 

Note that any trips must be reset before this 
procedure can be completed. 
 

 

Summary of Contents for Cutler-Hammer D64RPB30 Series

Page 1: ...l contactor contacts in the case of S C faults In this case the unit does not trip initially when the measured current exceeds the S C setpoint but waits for the upstream device to take care of curren...

Page 2: ...failed alarm state is As a result the red LED will now show the original cause of the trip 1 4 Reset Test pushbutton The built in momentary pushbutton is used to verify the condition of the D64RPB30 i...

Page 3: ...ontrol voltage is removed the relay will issue a 0 2 0 3 second pulse This means that when control voltage is restored after a trip due to loss of control voltage the contact will remain open This avo...

Page 4: ...ans that there is no electrical isolation between the control voltage input and the internal electronics As a result these share a common ground reference This reference is applied to the system throu...

Page 5: ...stalled beside the unit to act as the chassis ground point Use a minimum 14 AWG stranded conductor 6 For good EMC behavior it is important as in any installation to run all wiring especially if unshie...

Page 6: ...voltage 1 week minimum until the memory is read by pressing the Reset button Ground fault circuit G F Trip Level settable 0 03 0 10 0 50 1 2 3 5 9 A Accuracy of trip point 15 0 of Trip Level 3 G F Tri...

Page 7: ...8 A2 28 mm 1 1 inner diameter External CT Supervision circuit CT loop resistance causing a fault O C 1 k CT shunt resistance causing a fault S C 50 CT Fault Trip Delay 1 5 s Relay contacts Configurati...

Page 8: ...magnetic compatibility EMC for industrial process measurement and control equipment Part 4 2 Electrostatic discharge ESD immunity EN 61000 4 3 Electromagnetic compatibility EMC for industrial process...

Page 9: ...OURCE CURRENT CARRYING NEUTRAL WHEN USED GROUNDED SYSTEMS 1 Phase 2 wire 1 Phase 3 wire 3 Phase 3 wire 3 Phase 4 wire LOAD FIGURE 2 D64RPB30 TYPICAL FIELD CONNECTION WITH EXTERNAL 500 1 CURRENT TRANSF...

Page 10: ...1 38 35 2 36 60 2 76 70 1 38 35 Mounting hole Dia 0 22 5 5 DIN Rail Release 4 03 103 4 95 126 Dimensions Figure 3 Dimensions Drawing Approximate Dimensions in Inches mm Table 2 Approximate Dimensions...

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