Littelfuse PGR-6800 User Manual

Protection Relays & Controls

Motor Protection–Pumps (PGR 6000 Family)

PGR-6800 SERIES

Pump Protection Relay

Simpliﬁed Circuit Diagram

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.

Features & Beneﬁts

FEATURES BENEFITS

No CTs required

Adjustable trip settings

Output contacts

Remote indication

Overload

Phase loss/Phase sequence

Unbalance (current) Prevents overheating due to unbalanced phases

Undercurrent Detects low level or no-load conditions

No current transformers required for currents up to 91 A

Adjustable overload trip class setting from 5 to 15 for use with a wide variety of pumps

Form A and Form B ground-fault output contacts for operation of separate annunciation and trip circuits

Cause-of-trip indication and reset button Prevents insulation failures and ﬁres; extends

motor life

Detects unhealthy supply conditions

PGB-6800

(Remote Indication and Reset Assembly)

Ordering Information

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

ACCESSORIES REQUIREMENT

PGB-6800 Optional

Accessories

PGB-6800 Remote Indication and Reset Assembly

Optional remote indication of overload, undercurrent, phase unbalance, phase loss, and phase sequence. Remote reset included.

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”) Tes t Bu t ton 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)

Rev: 4-A-050213

Based on Manual Rev 0