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Protection Relays & Controls

Motor Protection–Pumps (PGR 6000 Family)

PGR-6800 SERIES

Pump Protection Relay

Description

The PGR-6800 Pump Protection Relay provides protection for

pumps with three-phase motors up to 1,000 Vac. No current

transformers are required for currents up to 91 A. The protective

functions include overload, phase unbalance, phase loss, phase

sequence and undercurrent. The PGR-6800 Pump Protection

Relay is ideally suited for applications where operating without

load can induce failure. Motor current is monitored and an

undercurrent trip occurs when the current drops below a

preset level. No additional level detectors are required.

PGR-6800 SERIES

PGB-6800

(Remote Indication

and Reset Assembly)

(Pump Protection Relay)

ORDERING NUMBER CONTROL POWER FULL-LOAD CURRENT

PGR-6801-24 24 Vdc 7-19.6 A

PGR-6801-120 120 Vac 7-19.6 A

PGR-6801-240 240 Vac 7-19.6 A

PGR-6802-24 24 Vdc 19-44.2 A

PGR-6802-120 120 Vac 19-44.2 A

PGR-6802-240 240 Vac 19-44.2 A

PGR-6803-24 24 Vdc 40-90.4 A

PGR-6803-120 120 Vac 40-90.4 A

PGR-6803-240 240 Vac 40-90.4 A

Ordering Information

Simpliﬁed Circuit Diagram

PGB-6800 Remote Indication

and Reset Assembly

Optional remote indication of overload,

undercurrent, phase unbalance, phase loss,

and phase sequence. Remote reset included.

Accessories

ACCESSORIES REQUIREMENT

PGB-6800 Optional

FEATURES BENEFITS

No CTs required

No current transformers required for currents up

to 91 A

Adjustable trip

settings

Adjustable overload trip class setting from 5 to 15

for use with a wide variety of pumps

Output contacts

Form A and Form B ground-fault output contacts for

operation of separate annunciation and trip circuits

Remote indication

Cause-of-trip indication and reset button

Overload

Prevents insulation failures and ﬁres; extends

motor life

Phase loss/Phase

sequence

Detects unhealthy supply conditions

Unbalance (current) Prevents overheating due to unbalanced phases

Undercurrent Detects low level or no-load conditions

Features & Beneﬁts

Speciﬁcations

Protective Functions

(IEEE Device Numbers)

Input Voltage See ordering information

Frequency 50, 60 Hz

Dimensions H 83 mm (3.3”); W 78 mm (3.1”); D 99 mm (3.9”)

Test Button Standard feature

Reset Button Standard feature

Output Contacts Isolated form A and Form B

Approvals UL Listed (E343314)

Warranty 5 years

Mounting DIN

Overload (49, 51)

Phase sequence (46)

Undercurrent (37)

Unbalance (current) (46)

Phase loss (current) (46)

Littelfuse.com/pgr-6800

Rev: 4-A-050213

Based on Manual Rev 0

PGR-6800 SERIES 1

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Littelfuse PGR-6800 Series Manual do Utilizador

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