BE1-951
General Information
1-7
Figure 1-1. Style Chart
•
Applications where bus protection is provided by a high speed Over current blocking scheme on the
transformer bus mains instead of a dedicated bus differential circuit.
•
Applications where the small size and limited behind-panel projection facilitates modernizing
protection and control systems in existing substations.
MODEL AND STYLE NUMBER DESCRIPTION
General
The BE1-951 Relay electrical characteristics and operational features are defined by a combination of letters
and numbers that make up the style number. The model number, together with the style number, describe
the options included in a specific device, and appear in the clear window on the front panel and on a sticker
located inside the case. Upon receipt of a relay, be sure to check the style number against the requisition
and the packing list to ensure that they agree.
Sample Style Number
Style number identification chart, Figure 1-1, defines the electrical characteristics and operational features
included in BE1-951 Relays. For example, if the style number were E3N1H0N, the device would have the
following characteristics and features.
BE1-951 - Three-phase current and three-phase voltage inputs
(E) - 5 ampere nominal system with 5 ampere independent ground input
(3) - Three-phase sensing
(N) - Not applicable (H1 case)
(1) - 48/125 Vac/Vdc power supply
(H) - H1 case
(0) - ASCII communication
(N) - None
