DZB-550 series intermediate relayDetailed product description：

Application of DZB-550 series intermediate relay
DZB-550 series intermediate relays are used in secondary circuits of power systems and industrial automation control circuits, as conversion control circuits or to expand the range of controlled circuits and ship power stations

2 Characteristics
2.1 It can provide 7 sets of dynamic closing, dynamic breaking, and conversion contacts, with a compact structure.
2.2 By turning the armature through the small hole on the cover, the contact action can be tested.
2.3 Relays can self protect voltage starting current (up to three current windings).
2.4 The coil excitation is direct current.

3 DZB-550 series intermediate relay action principle
This relay is an electromagnetic snap on structure with a holding coil, consisting of an electromagnetic system and a contact system. When the coil is energized, a magnetic field is generated through the iron core to attract the suction plate, which drives the spring plate to switch the contact circuit. The contacts adopt dual contact, which has the advantages of low contact resistance, strong contact reliability, and large load capacity for disconnection. The relay housing adopts the imported Combiflex protruding modular insertion structure.

4 Technical data
4.1 Operating voltage ≤ 70% of rated voltage, operating current ≤ 80% of rated current.
4.2 Holding value: Voltage ≤ 70% rated voltage, current ≤ 80% rated current.
4.3 Return>5% rated value.
4.4 Action time<40ms.
4.5 Coil power consumption: Voltage coil ≤ 4W, current coil ≤ 2W.
4.6 The contact is allowed to pass 5A current for a long time and can pass 50A current for 1 second or 25A current for 4 seconds.
4.7 Contact capability is the same as RXMAl type.
4.8 Insulation withstand voltage 50Hz, 1min, 2kV.
4.9 Impulse voltage 5kV.
4.10 can withstand seismic waves with a moderate magnitude of 5-15Hz.
4.11 Rated voltage, rated current, and coil resistance. (See Tables 2 and 3)

Voltage level DC (V)	twenty-four	forty-eight	one hundred and ten	two hundred and twenty
Coil resistance value (Ω)	three hundred and thirty	one thousand and four hundred	seven thousand	twenty-eight thousand

Rated current DC (A)

zero point two five

zero point five

zero point seven five

one

one point five

two

two point five

three

four

4.12 Contact form and code (see Table 4)

DZB-551 DZB-552 DZB-553

DZB-554 DZB-555 DZB-556

4.13 Protruding modular insertion structure, with external dimensions as shown inAppendix IIIAttached Figure 1 (2S6C).
4.14 Installation dimensions of protruding modular insertion structure base according toAppendix IIIOne can be inserted into Figure 5 (2S6C), two can be inserted side by side according to Figure 6 (2S12C), two can be inserted directly according to Figure 7 (4S6C), and four can be inserted according to Figure 8 (4S12C).

5 Ordering Instructions
Please indicate the model, contact code, and voltage level when placing an order.
Example: DZB-554-DC220V1A

DZB-550 series intermediate relay（No image available）