This is a DC neutral line relay fitted with independent non-fusible contacts.
It meets the requirements of relevant BRB Spec.
Relay types covered under this category are:
QN1 - Line Relay complying with BRS 930.
QNA1 - AC immune Line Relay complying with BRS 931A.
QS3 & QN1K - Neutral Line sensitive Relay complying with BRS 930
QNN1 - Twin Line Relay complying with BRS 960.
QNNA1 - Twin AC Immune Relay complying with BRS 966 F6.
QNA1K - AC immune, DC neutral, tractive armature, line relay with BRS 931 A.