Huazheng Electric Manufacturing HZHG-Z User manual

HZHG-Z High Voltage Divider
User Manual
Huazheng Electric Manufacturing (Baoding) Co., Ltd

！Safety Warning
The staff who carry out the high-voltage test must hold the “high-voltage test
permit”.
When using this instrument, users must abide by the provisions of the State
Grid Corporation Power Safety Work Regulations (Trial of Substation and Power Plant
Electrical Part), and install two obvious disconnect points before the working power enters
the tester. When disconnecting the product and wiring, the two breaking points should be
disconnected first.
Test circuit should be wired according to this manual, and carefully check
whether the grounding of the equipment and the test sample is good.

Contents
I. Introduction.....................................................................................................................................1
II.Technical Indicators...................................................................................................................... 1
III.Working Principle......................................................................................................................... 2
V.The Main Display Box Symbol Description.............................................................................. 4
VI.Description of Auxiliary Parameters......................................................................................... 5
VII.Preparation Before the Test......................................................................................................5
VIII.Basic Operation......................................................................................................................... 6
XI.Built-in Battery Instructions........................................................................................................ 8
XII.Precautions..................................................................................................................................9
XIII.Packing List................................................................................................................................ 9

1
I. Introduction
HZHG-Z series intelligent screen display AC/DC digital kV meter is mainly used for AC/DC
high voltage measurement and waveform analysis. The device consists of a high-stability
passive resistor-capacitor divider and a high-precision digital sampling analysis system (ie
5.7" LCD digital display meter) with a rechargeable battery inside the meter, which can be
sustained without backlighting. Work more than 8 hours. The voltage divider, LCD digital
display meter and measuring line, power cord, manual, etc. are concentrated in a light
aluminum alloy box, which is easy to carry and use.The kV meter is suitable for on-site
measurement of power systems and measurement of AC or DC high voltage in
laboratories of universities.
II.Technical Indicators
1．G e n e r a l S e r i e s P r o d u c t S p e c i f i c a t i o n s ：
Mo d e l
HZHG-Z
50KV
HZHG-Z
100KV
HZHG-Z
200KV
HZHG-Z
300KV
HZHG-Z
400KV
Rated
Voltage/kV
AC
50
100
200
300
400
DC
50
100
200
300
400
P r e c i s i o n
AC：1.0 level DC：0.5 level
Voltage
divider
impedance
A C / p F
250
150
75
50
37.5
D C / M Ω
240
400
800
1200
1600
Partial pressure
ratio
3000：1
5000：1
10000：1
15000：1
20000：1
Use environment
-5~40℃humidity≤80%
Dimension
/mm
divider
Φ95×300
Φ95×550
Φ95×900
Φ95×1350
Φ95×1800
Box
500×250×250
600×250×250
1100×250×250
1500×250×250
2000×250×250
Equipment weight
（kg）
8
14
17
35
45
2. Voltage measurement range: 0～rated voltage
3. Voltage display range: 0 ～1.2 times rated voltage
4. DC voltage measurement accuracy: 0.5% ± 2dig
5. AC voltage true RMS Vrms measurement accuracy: 1.0% ± 2dig
6. AC voltage peak Vp measurement accuracy: 1.5% ± 2dig

2
7. AC voltage Vp-p/2
2
measurement accuracy: 1.5% ± 2dig
8. AC measurement frequency response range: 30 ~ 300Hz
9. AC frequency measurement accuracy: 0.5% ± 2dig
10. Voltage divider withstand voltage: 1.1 times rated voltage for 1 minute
11. Power supply: external AC220V ± 10% 50Hz, built-in 12V rechargeable battery
12. Ambient temperature: -5℃～+40℃
13. Relative humidity: ≤80%
14. Altitude: ≤1000m
15. Chemical deposits that do not seriously affect the surface insulation and electrical
testing of equipment.
III.Working Principle
The intelligent digital kV meter consists of an AC and DC voltage divider and an LCD
digital display. The voltage divider is a passive RC capacitor, which consists of
high-precision low-temperature drift resistors and precision capacitors. The LCD digital
display head is composed of a single-chip microcomputer and a large-screen dot-matrix
liquid crystal display. The high voltage is divided by the voltage divider and is connected to
the digital display through the coaxial cable to automatically switch the AC and DC
functions. When the AC measurement is performed, the waveform of the measured high
voltage and the true RMS value can be simultaneously displayed on the display of the
meter head. , peak, peak
2
, frequency. The instrument is easy to operate and has high
measurement accuracy. The power supply is AC and DC, which is especially convenient
for field operation.

3
IV.Function Description
F i g u r e 1 F i g u r e 2
1．H e a d pa n e l s o c k e t d e s c r i p t i o n
a — — P o w e r s w i t c h : k V p o w e r s w i t c h .
b — — S i g n a l t e r m i n a l : S i g n a l c a b l e co n n e c t i o n in t e r f a c e .
C — — ~ 2 2 0 V : S i n g l e - p h a s e A C 2 2 0 V 5 0 H z e x t e r n a l w o r k i n g
p o w e r s u p p l y ( o r c h a r g i n g p o w e r s u p p l y ) .
d — — G r o u n d : S a f e t y gr o u n d c o n n e c t i o n .
2．T h e v o l t a g e di v i d e r s t r u c t u r e d e s c r i p t i o n , as s h o w n i n F i g u r e 2
H i g h vo l t a g e i n p u t : T h e h i g h vo l t a g e c o n n e c t i o n to b e te s t e d .
Ou t p u t: Th e v o lt a g e di v i d e r sa m p li n g s i g na l o ut p u t i s c on n e ct e d
t o t h e m e t e r p a n e l i n p u t .
G r o u n d i n g : Co n n e c t e d t o t h e g r o u n d n e t w o r k .
F i g u r e 3 a b o o t d i s p l a y i n t e r f a c e

4
F i g u r e 3 b n o r m a l d i s p l a y i n t e r f a c e
W h e n t h e s w i t c h b u t t o n i s p r e s s e d n o r m a l l y, t h e w e l c o m e sc r e e n
a s s h o w n i n F i g u r e 3 a w i l l a p p e a r. T h r e e b u t t o n s a p p e a r i n t h e
i n t e r f a c e , a n d p r e s s t h e c o r r e s p o n d i n g b u t t o n t o e n t e r t h e
c o r r e s p o n d i n g o p e r a t i o n i n t e r f a c e .
V.The Main Display Box Symbol Description
(Figure 3b screen display content)
1．To p l e f t : T h e m a i n d i s p l a y c o n t e n t i s t h e m e a s u r e d A C rm s o r D C
vo l t ag e v a l u e .
2．L e f t u p p e r r i g h t : T h e n u m b e r a t th i s p o i n t r e p r e s e n t s t h e
u s e r - d e f i n e d v o l t a g e d i v i d e r p a r a m e t e r ( t h e o n e s h o w n in
t h e f i g u r e i s t h e t r a n s f o r m e r 1 p r o p o r t i o n a l p a r a m e t e r
s h o w n i n F i g u r e 9 )
3．H z : T h e fr e q u e n c y of t h e me a s u r e d s i g n a l .
4．P ea k v a l ue /
2
：th e m a i n d is p l a y co n te n t i s 1 /
2
o f p e a k a c
v o l t a g e m e a s u r e d .
5 . P e a k : T h e m a i n d i s p l a y c o n t e n t i s t h e p e a k v a l u e o f t h e
m e a s u r e d A C v o l t a g e .
6 . Φ U I : D i s p l a y s t h e p h a s e d i f f e r e n c e d e t e c t e d b y t h e A C
si g n a l w h en u s i ng th e c u r re n t p ro b e.
7 . H ig h v o l t ag e s e t t in g v a l ue : T h e m a in d i s p l ay co n t e n t i s th e
u se r -d e f in e d h i g h v o lt ag e se t t i n g v a l ue .

5
8 . L e f t mi d d l e s q u a r e m a p : Th e m a i n di s p l a y s h o w s t h e w a v e f o r m o f t h e
m e a s u r e d A C v o l t a g e .
D C s i g n a l i n p u t d i s p l a y d i a g r a m A C s i g n a l i n p u t d i s p l a y d i a g r a m
F ig u r e 4 . S c re e n sh o t o f te s t r e su l ts
VI.Description of Auxiliary Parameters
(The content displayed at the bottom of the screen of FIG. 3b)
1 . S y s t e m i n f o r m a t i o n : di s p l a y s y s t e m w o r k i n g st a t u s , s u c h as l o w
b a t t e r y p o w e r, hi g h vo l t a g e o v e r - v o l t a g e a l a r m , e t c .
2 . D a t e c l o c k d i s p l a y b o x : da t e c l o c k i s t h e c u r r e n t r e a l - t i m e t i m e .
3 . P o w e r i n d i c a t o r b o x : h o s t ba t t e r y s t a t u s .
VII.Preparation Before the Test
T h e h i g h v o l t a g e d i v i d e r is p l a c e d i n a c e r t a i n s p a c e , t h a t i s , k e e p
t h e s u r r o u n d i n g s p a c e n o t l e s s t h a n 2 t i m e s t h e h e i g h t o f t h e d i v i d e r
d i s t a n c e .
G r o u n d i n g c o n n e c t i o n : g r o u n d i n g c o l u m n at t h e b o t t o m o f th e
v o l t a g e d i v i d e r an d o n t h e f a c e p l a t e o f t h e m e t e r h e a d . B r a i d e d c o p p e r
w i r e i s u s e d f o r r e l i a b l e g r o u n d i n g . S i g n a l c o n n e c t i o n : t h e c o a x i a l c a b l e
p r o v i d e d to t h e u s e r i s th e s a m p l i n g s i g n a l c o n n e c t i o n ca b l e fo r t h i s k v
m e t e r, w h i c h is c o n n e c t e d f r o m t h e s i g n a l ou t p u t o u t l e t a t t h e b o t t o m o f
t h e vo l t a g e d i v i d e r t o t h e s i g n a l i n p u t p o r t o n t h e fa c e pl a t e o f th e me t e r.
N ot e : t h e s i g n a l c o nn e c ti o n c a b le is fo r s p ec i al us e on ly, d o no t u s e
o t h e r co a x i a l c a b l e o r a n y c o n n e c t i o n c a b l e c o n n e c t i o n !

6
H i g h v o l t a g e c o n n e c t i o n : u s e h i g h vo l t a g e l e a d t o co n n e c t t h e h i g h
v o l t a g e m e a s u r e d e n d t o t h e M 1 0 s c r e w o f t h e eq u a l i z i n g c a p o n t h e to p
o f t h e v o l t a g e d i v i d e r.
VIII.Basic Operation
P r e s s t h e " s w i t c h " b u t t o n t o p o w e r o n , a n d t h e sc r e e n d i s p l a y s t h e
m e a s u r e m e n t i n t e r f a c e a s s h o w n i n f i g u r e 3 b . T h e m e a s u r e m e n t c a n be
ma d e b y co n n e c ti n g th e si g na l li n e of co a x i a l c a bl e to t he in t e ll ig e n t
d i g i t a l k i l o v o l t m e t e r. W h e n th e e ff e c t i v e v o l t a g e s i g n a l i s i n p u t , th e
s y s t e m w i l l a u t o m a t i c a l l y d i s t i n g u i s h a c a n d d c a n d d i s p l a y t h e
c o r r e s p o n d i n g v a l u e o f t h e vo l t a g e s i g n a l o n t h e d i s p l a y p a n e l .
IX.System Setting
F ig u r e 5 i n te r f a ce d i ag r a m o f sy s t e m se t u p
I n t h e no r m a l d i s p l a y st a t e o f f i g u r e 3, c l i c k " s y s t e m S e t t i n g s " a n d
t h e i n t e r f a c e o f f i g u r e 5 wi l l a p p e a r

7
Fi g u r e 7 Vo l ta g e d i v id e r p a ra m e t e r se t t in g in t e r f a ce
(1 ) v o l ta g e d i v id e r p a ra m e t e r se t t in g : se e fi g u re 7 . T h i s s e tt i n g i s
m a i n l y u s e d t o s e l e c t t h e s e c t i o n n u m b e r o f v o l t a g e d i v i d e r, a n d e a c h
s e c t i o n n u m b e r c o r r e s p o n d s to t h e p r o p o r t i o n a l p a r a m e t e r s s e t i n
f i g u r e 9 .
（2）S ys t e m t i m e s e tt i n g: cl i c k th e ti m e s e t ti n g i n t h e i n te r f a ce in
f i g u r e 5 , a n d t h e i n t e r f a c e in f i g u r e 8 w i l l a p p e a r. C l i c k t h e
c o r r e s p o n d i n g v a l u e to m o d i f y t h e ti m e .
Fi g u r e 8 S y s te m t i m e s e t t in g i n t e rf ac e
（3）h ig h v o l ta g e s e t t in g v a l ue : th e hi g h v o l ta g e s e t ti n g v a l ue i s
d e f i n e d b y t h e cu s t o m e r an d a p p e a r s i n th e n o r m a l d i s p l a y i n t e r f a c e .
W h e n t h e f i n a l me a s u r e m e n t v a l u e e x c e e d s t h e se t v a l u e , a n a l a r m
w i l l b e se n t o u t i n t h e s y s t e m i n f o r m a t i o n , i n d i c a t i n g " h i g h v o l t a g e
o ve r - v o l t a ge a l a r m" .
（4）e xi t t h e c u r r en t w in d ow : a f t e r s e tt in g , c l i ck " r e t u rn " t o s a ve t h e
m o d i f i c a t i o n a n d e n t e r t h e di s p l a y i n t e r f a c e o f f i g u r e 5 .

8
X.Parameter Calibration
F ig u r e 9 p a r a m et e r c a li b r a ti o n i nt e rf a c e
C l i c k “ P a r a m e t e r C a l i b r a t i o n ” on t h e n o r m a l d i s p l a y i n t e r f a c e o f
F i g u r e 3 . A f t e r i n p u t t i n g t h e s y s t e m p a s s w o r d ( d e f a u l t : 1 2 3 4 5 6 ) , i t w i l l
e n t e r t h e p a r a m e t e r ca l i b r a t i o n i n t e r f a c e s h o w n i n t h e f i g u r e a b o v e ,
a nd d i r e ct l y i np u t t h e p a r a m et e rs to c ha n g e t h e r e qu i r e d s ca l e v a lu e .
XI.Built-in Battery Instructions
1 . I n th e l o w e r r i g h t c o r n e r o f t h e n o r m a l d i s p l a y i n t e r f a c e
s c r e e n , th e b u i l t - i n po w e r s u p p l y of th e m a i n u n i t i s d i s p l a y e d .
T h e l e n g t h o f t h e g r e e n e n e r g y c o l u m n s h o w s t h e b a t t e r y ' s
p o w e r. I f i t i s c h a r g i n g , t h e c h a r g i n g e n e r g y d i s p l a y w i l l
co n t in u e t o m o v e .
2 . W h e n t h e b a t t e r y p o w e r m o d e i s u s e d , w h e n th e b a t t e r y
v o l t a g e i s to o lo w, “ B a t t e r y L o w ” w i l l b e d i s p l a y e d i n t h e s y s t e m
i n f o r m a t i o n di s p l a y b a r, a n d i t c a n b e c h a r g e d w h e n th e 22 0 V

9
A C po w e r su p p l y i s co n ne c t e d wi t h t h e s u pp l ie d p ow e r c o rd .
W h e n t h e v o l t a g e i n d i c a t i o n r e a c h e s t h e s e t s t a n d a r d d u r i n g
ch a r g in g , i t i s f u ll . T h e l o w b a t te r y a l a rm is re l e as e d i n t h e
s y s t e m i n f o r m a t i o n , a n d t h e r e i s n o n e e d t o t u r n o n t h e p o w e r
s w i t c h d u r i n g ch a r g i n g .
XII.Precautions
T hi s e q u ip m e nt s h ou l d b e r e gu l a r ly c a l ib r at e d t o e ns u r e t h e
a c c u r a c y o f th e m e a s u r e m e n t . S t o r e i n a w a r e h o u s e w i t h a s u i t a b l e a i r
d r y i n g t e m p e r a t u r e . C h e c k th e e q u i p m e n t w h e n r e m o v i n g i t . M a k e s u r e
t h a t t h e su r f a c e i s c l e a n a n d f r e e o f c o n d e n s a t i o n . I f n e c e s s a r y, w i p e i t
w i t h a d r y a n d c l e a n c l o t h b e f o r e tu r n i n g i t o n .
T h e s u r f a c e o f t h e s c r e e n i s e q u i p p e d w i t h a c o n d u c t i v e g l a s s l a y e r
t h a t i s an t i - s t a t i c a n d s t r o n g e l e c t r i c f i e l d t o p r e v e n t s h a r p a n d h a r d
o b j e c t s f r o m s c r a t c h i n g o r d a m a g i n g t h e p r o t e c t i v e l a y e r.
XIII.Packing List
No.
Item
Qty
1
D i g i t a l d i s p l a y m e t e r
1
2
Vo l t a g e d i v i d e r
1
3
Power line
1
4
C o a x i a l c a b l e (s i n g l e wi t h s p e c i a l p u r p o s e )
1
5
Fuse pipe（1 A ）
4
( N o t e : T h e p r e s s u r e e q u a l i z e r o f t h e v o l t a g e l e v e l o f 30 0 k V a n d a b o v e
i s s e p a r a t e l y p a c k e d ）