NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS Relays can mainly be divided into three types: normal open, normal closed and mixed type relays. Scheme 470 Log in Scheme 470: NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS Scheme 471 Log in Scheme 471: TYPE OF STANDARDIZED RELAYS Scheme 472 Log in Scheme 472 Scheme 473 Log in Scheme 473: ENGINE COMPARTMENT Scheme 474 Log in Scheme 474: PASSENGER COMPARTMENT Scheme 475 Log in Scheme 475