Product Introduction

The 369-HI-R-B-F-E-H-E from General Electric Multilin is a 369 motor protection relay. This series of relays is designed to protect motors (three phase) and associated systems while providing many basic features and options at both control input power levels. While these components are now in legacy status and are no longer available from the OEM, AX Control is committed to maintaining current stock of as many models as possible. This allows us to quickly fulfill your order. Most current products ship within 24 hours, many in less than 2 hours.

The 369-HI-R-B-F-E-H-E is available with a variety of options. This includes 12 RTD inputs. The RTD unit is located on the left side of the rear of the unit. The unit also has an optional metering package. The metering package adds access to the VT input, allowing voltage and power elements. Metering of Hz, kVA, KW, Volts, and MWhrs is possible with this option.

The 369-HI-R-B-F-E-H-E also has an additional fiber optic port installed. The fiber port baud rate is 1200~19200, using Modbus RTU protocol. Used for channel 3. When used for channel 3, the channel 3 RS485 connection will be disabled. However, the device still has other available RS485 ports. In addition, the device has an RS232 port that can be used to connect to a PC. This is often used to communicate with GE's EnerVista software.

Relay working principle
When the coil is energized, its moving contact B is immediately disconnected from the static contact A and closed with the static contact C, cutting off the static contact A control line and contacting the static contact C control line.

When the coil is de-energized, the moving contact is reset, that is, the moving contact B is disconnected from the static contact C and reset and closed with the static contact A, cutting off the static contact C control line and connecting the static contact A control line.

When no voltage is applied to both ends of the coil, the coil does not generate magnetic force, and the tension of the spring makes the common contact contact the normally closed contact. At this time, the controlled power supply is not connected to the electrical appliance, and the electrical load does not work.

When the switch is closed, that is, a certain voltage is applied to both ends of the coil, the coil current causes the iron core to generate magnetic force to suck the armature down, so that the common contact contacts the normally open contact, so that the controlled power supply is connected to the electrical equipment, and the electrical load starts to work. Relay contact protection circuit voltage
The voltage of the contact circuit will generate a very high reverse voltage when the circuit contains induction. The higher the voltage, the greater the energy. Since the consumption and movement of the contacts increase, it is necessary to pay attention to the control capacity of the relay. In addition, the control capacity will be extremely reduced when the DC voltage is used, so it is necessary to pay attention. This is the case of DC. If there is no zero point (the point where the current is zero) like AC current, it is difficult to eliminate the arc once it occurs, and the arc time becomes longer. In particular, because the direction of the current is fixed, it will cause the movement of the contacts, which is related to the consumption of the contacts.

Generally, the approximate control capacity is recorded in the manual, but this alone is not enough, and it should be tested and confirmed in a special contact circuit. In addition, although the manuals and other documents describe the resistive load and the limited control capacity, this mainly indicates the level of the relay. It is generally more appropriate to consider it in terms of the current capacity of an AC 125V circuit. The minimum applicable load listed in the manual is not the lower limit standard value or guaranteed value that the relay can switch on and off. The reliability of this value varies depending on the switching frequency, environmental conditions, changes in the required contact resistance, and the absolute value. If you require simulated micro-load control or a contact resistance of less than 100mΩ (measurement, wireless, etc.), please use a relay with AgPd contacts.

Current
The current when the contact is closed and open has a significant impact on the contact. For example, when the load is a motor or an indicator light, the greater the inrush current when closed, the greater the consumption and movement of the contact. Due to the adhesion and movement of the contact, the contact cannot be disconnected. Please confirm carefully during actual use.

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