How should the 380v heating tube be wired?

- Aug 28, 2019-

The electric heating tube of the single-head heating tube 380V uses two fire lines, and no zero line is used.


The single-head electric heating tube is a heating element. The ordinary electric wire sheath is easily hardened and detached after being heated, and is prone to failure. It is better to use the terminal block at the connection between the wire and the heating pipe to ensure good contact and heat generation. Keep the wires away from the heat pipes as far as possible. The wires near the joints should be protected by a heat-resistant casing or porcelain tube to prevent insulation damage after heat generation.


The 380V heating tube can also be used on a 220V power supply, but the power is reduced and the heating is slow. A large number of heating devices for single-head electric heating tubes use three-phase power supply. The three groups of heating tubes are connected to a star without a neutral line, and the voltage on each tube is actually 220V. If connected to a delta connection, the voltage on each tube is 380V.


Single-head electric heating tube voltage (v): 24, 36, 72, 100, 110, 115, 120, 220, 230, 235, 240, 380


Power (w): 150 ~ 5000 Power error (%) +5 ~ -10


Length (mm): 180 ~ 1800 length error (mm)


Pipe diameter ф(mm): 8,10,12,14,18,23,33, pipe diameter error (mm) ±0.05


Stainless steel pipe materials are: SUS304, SUS304L, SUS316L, SUS316Ti, SUS305, SUS321, SUS309S, SUS310S, INC840, INC800,


How to choose the material of the electric heating tube for the single-head electric heating tube:


Single-head electric heating tube


1, oil


Under normal circumstances, the stainless steel 304 heat pipe can also be made of iron. The iron material is lower in cost than the electric heating tube made of stainless steel 304, but is more likely to rust.


2, corrosive liquid


(1) Weak acid and weak base: A corrosion-resistant 316L heating rod can be used.


(2) Strong corrosion and high pH: Teflon coated electric heating tubes can be used.


3, water


(1) Ordinary tap water: It is enough to use a flanged heating tube made of stainless steel 304.


(2) The water quality is relatively hard and the scale is serious: at this time, a stainless steel 304 and a waterproof scale coating material can be used.


(3) Heating drinking water: At this time, it is necessary to use food grade 316 electric heating tube.


4, dry air


Air dry electric heating tube is special, the material of electric heating rod is not fixed, it is based on the temperature of the environment to determine which material is used. In order to guarantee the service life of the heating pipe, corresponding temperature control must be carried out.


The working temperature is about 100-300 degrees, and the heating tube material is made of stainless steel 304.


The working temperature is about 400-500 degrees, and the material of stainless steel 321 can be selected.


The working temperature is about 600-700 degrees, and the material of stainless steel 310S should be used.