1. The standard rated voltage of the electromotor are **0V, **0V,
**0V, **0V etc. Voltage of other classes can also be derived
according specific situation, but must be negotiated when
ordering.
2. The basic excitation style is separately excited, the excited
voltage is **0V, Voltage of other classes can also be derived
according specific situation, but must be negotiated when
ordering.
3. Short time overload capacity of motor.
Motor
can be divided into two kinds according to the
use
First kind (A): ordinary industrial DC motor; Second kind (B):
metal rolling mill DC motor.
a) First kind
(A) motor can endure the overload (1min) according to table
1
Table 1
|
percentage of basic speed
|
percentage of basic speed
|
|
seldom using
|
constantly using
|
|
**0
|
**0
|
**5
|
|
**0
|
**0
|
**0
|
|
>**0
|
**0
|
**5
|
b) First kind
(B) motor can endure the overload (1min) according to table
2
c) The short time overload capacity seldom used
means happens infrequency or only at the urgency, the motor
working exceed the continuous rated overload capacity, we
suggest you adjust the instantaneous open/close device of the
switch according to the short time overload capacity seldom
using.
The short time overload capacity seldom constantly used means its
an part of the normal working period, the motor endure the
continuous rated overload capacity again and again. After working
at short time overload, it must working light load to make the
overload periods overload root-mean-square less than its continuous
ration.
d) Second kind DC motor(B)can endure the
following continuous load; Working continuous within the rated
voltage and rotate speed with **5% rated power overload, the
temperature is higher when at this overload, other features maybe
different from working at the rated condition.
Within the rated voltage and rotate speed, after running at the
rated overload, working at the **5% rated power for two hours, the
temperature rise cant overrun the regulated numerical value other
features maybe different from working at the rated
condition.
e) Second kind
DC motor(B),at the rated rotate speed, the overload can reach 2.5
times no longer than *5s only used once in a while.
4. The change rate of current
Under all rotate speed and load, the change rate
of current (di/dt) that the motor can endure is **0
times rated current.
5. Libration and noise
a) the libration of the motor accords with
GB****8Measurement evaluation and limits of the vibration
severity of rotating electrical machines which the shaft
center height is *6mm and above center standards
regulation.
b) The noise of the motor accords with GB****9.3 Measurement
of airborne noise emitted by rotating electrical machinery and
noise limits.
6.working condition
a) Altitude above sea level maximal is1,**0m;
b) Cooling air temperature maximal is *0oC; Cooling water
temperature maximal is *2oC;
c) The motor can be installed under foul situation, but the right
cooling method of cooling method of cooling and defend
class must be chosen. If the situation is special, please
negotiate.
d) The motor is suitable for *-phase bridge rectfier power supply,
also can adopt power supply of DC generator.
e) The motor accord with GB**5 ''The
ration and performance of the rotating electrical
machinery'',
IEC******1 ''The
ration
and performance of the rotating electrical
machinery'' and JB/T***7
''Technical requirements of Z series middle motor
electromotor''.
7.The
efficiencies listed in the data sheet are for rated
output, voltage and speed, and include excitation
loss.
The choice of the motors capacity
1.First kind (A): Ordinary industrial DC motor.
The technical data of this kind of motor please see the technical
data table. The buyer can decide the capacity, voltage, running
speed and the method of cooling of the motor at the buyers
option.
2. Second kind (B): Metal rolling mill DC motor.
The output power of this kind of motor is about *0% lower than kind
(A), the detail numerical value can be negotiated by the user and
the manufacture.
3. Exclude the specification of technical data
in the table. Manufacturer can derive other specification at the
requirement of the user..
