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external voltage of 2.5V is applied, corresponding resistance values at different
temperatures are shown in Table 1
Table 1 The inspecting temperature and resistance corresponding table of PTC heat
detector
Resistance of 3 PTC heat detecting
elements
connected with each other
(Ω)
in series
Temperature
in
winding
(℃)
4.3.2 Connection of the brake electromagnet connection box
●
The electromagnetic coil in the brake electromagnet should be connected with DC
voltage. When the brake is required to release, quick response excitation voltage of
DC200±10V should be electrified until the power supply is switched off.
●
For the connection of the brake, it is necessary to use 2-core cable with its
cross-section ≥0.75mm
●
The connection terminals of electromagnetic coil and 2 micro-switches are inside the
connection box, and there should be no dust, humidity and others objects inside the
connection box during connecting (see picture 3).
●
The connection terminal of braking micro-switch should be connected in
normally-closed state, namely when the brake is in braking state (the electromagnetic
coil is de-energized), the two groups switch contacts are in closed state, and when the
electromagnetic coil of the brake is energized (the brake is released), the two groups
switch contacts of the braking micro-switch are in open state
●
The current is 0.3A when the excitation voltage for braking electromagnetic coil is
DC200V.
●
For the interrupting capacity of micro-switch, the voltage does not exceed AC250V,
current does not exceed 0.5A
●
The actuation position of the braking micro-switch can be implemented by the
adjusting bolt of brake switch.
4.3.3 Encoder connection
●
Before the encoder is connected or disconnected with the frequency converter, power
supplied to the frequency converter must be turned off in order to avoid any damages
to the inverter and encoder.
●
WYJ140 series traction machines may be provided with a wide range of optional
encoders so that can select different inverters. On ordering, users should select
corresponding encoder according to the used frequency converter, or select the
frequency converter according to the used encoder. If users feel difficult to determine
it, they should consult the manufacturer of the frequency converter.
●
The standard length of the signal cable of encoder is 10m. It also can be provided as
per users' requirements, but the max length cannot exceed 10m
●
In order to prevent the interfere to the signal cable of encoder from the cable of
traction machine, the power supply cable of traction machines and signal cable of
encoders should be laid separately.
5 Commissioning of traction machine
●
Commissioning of traction machine is actually to ensure optimum adaptation between
frequency converter and traction machine. Therefore it is necessary to have a good
understanding
commissioning and use
the
corresponding
2
and its insulating withstand voltage≥500V
and
abundant
≤300
≤1650
25
115
experiences
to
≥3990
125
the
frequency
converter
≥12000
≥135
in
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