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参数资料
| 型号： | CASR 50-NP |
| 厂商： | LEM USA Inc |
| 文件页数： | 12/18页 |
| 文件大小： | 0K |
| 描述： | SENSOR CURRENT 50A 5V MOD |
| 产品培训模块： | CAS Modules Overview |
| 产品目录绘图： | CAS(R) Series Side |
| 标准包装： | 50 |
| 系列： | CASR |
| 电流 - 感应： | 50A |
| 精确度： | ±0.8% |
| 灵敏度： | 12.5mV/A |
| 传感器类型： | 磁通量闸门 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 输出： | 0 ~ 5 VDC |
| 频率： | 300kHz |
| 响应时间： | 300ns |
| 电极标记： | 双向 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 模块 |
| 包装： | 管件 |
| 产品目录页面： | 2809 (CN2011-ZH PDF) |
| 其它名称： | 398-1094-5 |
CASR series
Performance parameters definition
I
V ( t ) ? V ( t ) 1
= ?
2 Gth
Ip( t
t 1
t
Ip(3)
Ampere-turnsandamperes
The transducer is sensitive to the primary current linkage
Q P (also called ampere-turns).
Q P = N P I P (At)
Where N P I P the number of primary turn (1, 2 or 3
depending on the connection of the primary
jumpers)
Caution: As most applications will use the transducer with only
one single primary turn ( N P = 1), much of this datasheet is
written in terms of primary current instead of current linkages.
However, the ampere-turns (A-t) unit is used to emphasis that
current linkages are intended and applicable.
Transducer simplified model
The static model of the transducer at temperature T A is:
V OUT = G Q P + error
In which error =
V OE + V OT ( T A ) + ε G · Q P ·G + ε L ( Q Pmax )· Q Pmax ·G + TCG ·( T A -25)· Q P · G
With: Q P = N P I P :the input ampere-turns (At)
Please read above warning.
Q P max :the maxi input ampere-turns that have
been applied to the transducer (At)
V OUT :the secondary voltage (V)
T A :the ambient temperature (°C)
V OE :the electrical offset voltage (V)
V OT ( T A ) :the temperature variation of V O at
temperature T A (V)
G :the sensitivity of the transducer (V/At)
ε G :the sensitivity error
ε L ( Q Pmax ) :the linearity error for Q Pmax
This model is valid for primary ampere-turns Q P between
- Q Pmax and + Q Pmax only.
Sensitivity and linearity
To measure sensitivity and linearity, the primary current (DC)
is cycled from 0 to I P , then to - I P and back to 0 (equally spaced
I P /10 steps).
The sensitivity G is defined as the slope of the linear regres-
sion line for a cycle between ± I PN .
The linearity error ε L is the maximum positive or negative
difference between the measured points and the linear
regression line, expressed in % of I PN .
Magnetic offset
The magnetic offset current I OM is the consequence of a cur-
rent on the primary side (“memory effect” of the transducer ’s
ferro-magnetic parts). It is included in the linearity figure but
can be measured individually.
It is measured using the following primary current cycle.
I OM depends on the current value I P1 .
OUT 1 OUT 2
OM
I P (DC)
I P1
t 2
0A
3)
- I P1
Figure 30: Current cycle used to measure magnetic and
electrical offset (transducer supplied)
Page 12/18
8March2012/version 7
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
www.lem.com
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