SFP Series Pump Seal Failure Relays are designed to
monitor the shaft seals of submersible pumps. A resistive-measuring probe is
installed in the pump seal cavity. If the seal starts to leak, contaminating
fluid enters the seal cavity. This lowers the resistance between the internal
probe & the common connection. When the resistance drops below the
user-adjustable sensitivity set-point of the relay, the output relay energizes
& the LED turns Red ON. The relay output can be used to give an alarm
indication of a leaking seal. These products will automatically reset when the
fault condition clears. |
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Three
output configurations are offered: an 8 pin SPDT single channel relay & an
11 pin DPDT single channel relay to monitor a single pump, and an 8 pin dual
channel relay (with 2 SPNO contacts) to monitor two pumps. Probes are pulsed
with a DC voltage to prevent potential electroplating issues. |
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Features:
- Monitors Submersible Pump Seals for Leakage
- Single or Dual Channel for Monitoring 1 or 2 Pumps
- Two Adjustable Sensitivity Ranges
- Probe is Pulsed with a DC Voltage to Prevent
Electroplating
- Low-Profile Adjustment Knob
- Uses industry-standard 8 & 11 pin octal sockets
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Part Number |
Configuration |
Input Voltage |
Sensitivity Range |
Wiring Socket |
SFP120A025
|
Single Channel 8-Pin SPDT |
120V AC |
10K to 25KΩ |
 |
SFP120A100
|
4.7K to 100KΩ |
SFP120A250
|
10K to 250KΩ |
SFP240A025
|
240V AC |
10K to 25KΩ |
SFP240A100
|
4.7K to 100KΩ |
SFP240A250
|
10K to 250KΩ |
SFP120B025
|
Single Channel 11-Pin
DPDT |
120V AC |
10K to 25KΩ |
 |
SFP120B100
|
4.7K to 100KΩ |
SFP120B250
|
10K to 250KΩ |
SFP240B025
|
240V AC |
10K to 25KΩ |
SFP240B100
|
4.7K to 100KΩ |
SFP240B250
|
10K to 250KΩ |
SFP120C025
|
Dual Channel 8-Pin (2)
SPNO |
120V AC |
10K to 25KΩ |
 |
SFP120C100
|
4.7K to 100KΩ |
SFP120C250
|
10K to 250KΩ |
SFP240C025
|
240V AC |
10K to 25KΩ |
SFP240C100
|
4.7K to 100KΩ |
SFP240C250
|
10K to 250KΩ |
Voltage Tolerances: |
AC Operation: +10/-15% of nominal at 50/60 Hz. |
Load (Burden): |
3 VA |
Probe Voltage: |
5V DC Pulsed |
Response Time: |
Pick-up: 1 Second Drop-out: 1 Second |
LED Indicator: |
Green ON with input voltage applied; Red ON when seal leak
detected and relay energized |
Temperature: |
-28° to 65°C (-18° to 149°F) |
Output Contacts: |
Single Channel Relays: 10A @ 240V AC / 7A @ 30V DC, 1/4HP @
120V AC Dual Channel Relays: (2) 5A @ 240V AC / 5A @ 30V DC, 1/4HP @ 120V
AC |
Life: |
Mechanical: 10,000,000 operations, Full Load: 100,000
operations |
Mounting: |
Requires Industry-Standard 8 Pin Octal Socket (Macromatic
70169-D or
equivalent) or 11 Pin Octal Socket (Macromatic 70170-D or
equivalent) |
Typical
Installations - 3 Switch 3 Pump |
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