8-1393792-8 TE Connectivity, 8-1393792-8 Datasheet - Page 462

• Manufacturer Part Number: 8-1393792-8
• Description: Electromechanical Relay DPDT 3A 12VDC 968Ohm Through Hole
• Manufacturer: TE Connectivity
• Type: Signal Relayr

Specifications of 8-1393792-8

• Contact Arrangement: DPDT
• Dc Coil Voltage: 12 V
• Coil Current: 12.4 mA
• Mounting: Through Hole

1306
Operation
Monitor Operation: When the input voltage parameters are normal, the
"Contacts Transferred" LED will be on and relay is energized. Once the unit
has responded to a fault by releasing the output relay and simultaneously
extinguishing the "Contacts Transferred" LED, the nature of the fault that
caused the release will be identified by one of the four fault status indicators.
In the automatic reset mode, the status indicator will extinguish and the
"Contacts Transferred" LED will re-light once all faults are corrected and
restart delay period has expired. In the manual reset mode, the fault
indicator will flash when all faults have been corrected, thus indicating that
the unit is ready for manual reset. When manually reset, the flashing fault
status indicator will extinguish and the "Contacts Transferred" LED will re-
light. Series PMA has a fixed start-up delay of approximately 375 millisec-
onds. Series PMB has a start-up delay, adjustable from 0 to 5 minutes,
which permits staggered restarting of motors, etc., affected by a common
power outage. If the unit is wired for manual reset, the external reset switch
must also be opened.
the fault conditions occur. (See Figures 1 and 2)
Phase Loss Condition: If the voltage of any phase drops below 68% of the
nominal voltage setting for more than two line cycles, the output relay will
release. If back EMF accompanies the loss of a phase, the unit will sense
the loss as a phase imbalance and the relay will drop out.
Phase Reversal Condition: If any two phases become reversed for more
than two line cycles, the output relay will release.
Undervoltage Condition: By strapping, the user can select one of four
undervoltage thresholds: 10%, 14%, 17% or 20% below the nominal
voltage, which is entered by means of a calibrated potentiometer located on
the front panel. When the average voltage drops below the selected
threshold, a time delay shown in Fig. 1 is initiated. The unit then continues
to monitor the severity of the fault and modifies the time delay accordingly.
If the undervoltage condition persists, the time delay will expire and the
output relay will release.
Phase Imbalance Condition: The unit continuously averages the three
phase voltages and recognizes individual deviations from the average. By
strapping, the user can select one of four imbalance thresholds: Either
2.0%, 3.0%, 3.5%, 4.0%, or 5.0%, 7.0%, 8.5%, 10.0% depending on
model. When any phase voltage deviates more than the selected percent-
age from the three phase average, a time delay as shown in Fig. 2 is
initiated. The unit then continues to monitor the severity of the fault and
modifies the time delay accordingly. If the phase imbalance condition
persists, the time delay will expire and the output relay will release.
Typical Connection Diagram
Dimensions are shown for
reference purposes only.
M
L1
LOAD
L2
The output relay will remain in the transferred state until one of
L3
VOLTAGE
RESPONSE CURVES
UNDERVOLTAGE
ØA
U1
11
1
6
FORM A N.O.
STOP
CONTACTS
CONTROL VOLTAGE
UP TO 240VAC
START
U2
12
2
7
M
Dimensions are in inches over
(millimeters) unless otherwise
specified.
VOLTAGE
RESPONSE CURVES
M
PHASE IMBALANCE
LINE VOLTAGE >240VAC)
(IF USED)
ØB
13
I 1
3
8
FORM B N.C.
(REQUIRED FOR
OL's
CONTACTS
TRANSFORMER
14
I 2
4
9
RESET
COMMON
MAN.
VOLTAGE
ØC
10
15
5
Catalog 1308242
Issued 3-03
Figure 1
Figure 2
Strapping Diagrams
Undervoltage Threshold
10.0%
14.0%
17.0%
20.0%
Low Phase Imbalance Threshold
Model PMAL*SL or PMBL*SL
2.0%
3.0%
3.5%
4.0%
High Phase Imbalance Threshold
Model PMAL*SH or PMBL*SH
5.0%
7.0%
8.5%
10.0%
Specifications and availability
subject to change.
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Technical support:
Refer to inside back cover.
AGASTAT